docs: fix spelling mistake

[YanxinTang]

Pull request checklist

• Addresses an existing issue: Fixes #0000
• Include a change request file using $ yarn change

Description of changes

change 'exta' to 'extra'

Focus areas to test

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 3142a02:

Sandbox	Source
Fluent UI Button	Configuration
microsoft/fluentui: codesandbox-react-template	Configuration

[size-auditor]

Asset size changes

Size Auditor did not detect a change in bundle size for any component!

Baseline commit: ae46225e1b94e6b348daa23fe90d983a285ce4ad (build)

[ecraig12345]

Thanks! Before this can merge you’ll need to clone the repo and run yarn followed by yarn change to create a change file.

[ghost]

All CLA requirements met.

[msft-github-bot]

Perf Analysis

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
BaseButton	mount	860	904	5000
ButtonNext	mount	552	546	5000
Checkbox	mount	1497	1565	5000
CheckboxBase	mount	1256	1277	5000
CheckboxNext	mount	1611	1553	5000
ChoiceGroup	mount	4856	4798	5000
ComboBox	mount	910	897	1000
CommandBar	mount	7435	7505	1000
ContextualMenu	mount	13386	13217	1000
DefaultButton	mount	1066	1068	5000
DetailsRow	mount	3479	3523	5000
DetailsRowFast	mount	3466	3471	5000
DetailsRowNoStyles	mount	3226	3253	5000
Dialog	mount	1503	1525	1000
DocumentCardTitle	mount	1819	1767	1000
Dropdown	mount	2529	2507	5000
FocusZone	mount	1786	1769	5000
IconButton	mount	1664	1692	5000
Label	mount	328	331	5000
Link	mount	433	429	5000
LinkNext	mount	446	443	5000
MenuButton	mount	1390	1391	5000
Nav	mount	3218	3192	1000
Panel	mount	1407	1409	1000
Persona	mount	859	820	1000
Pivot	mount	1386	1348	1000
PivotNext	mount	1326	1349	1000
PrimaryButton	mount	1185	1204	5000
SearchBox	mount	1233	1234	5000
SearchBoxNext	mount	1247	1303	5000
Slider	mount	1422	1466	5000
SliderNext	mount	1914	1848	5000
Spinner	mount	424	452	5000
SplitButton	mount	3061	3096	5000
Stack	mount	488	504	5000
StackWithIntrinsicChildren	mount	1917	1992	5000
StackWithTextChildren	mount	4839	4809	5000
TagPicker	mount	2654	2651	5000
Text	mount	423	422	5000
TextField	mount	1322	1329	5000
ThemeProvider	mount	2933	3047	5000
ThemeProvider	virtual-rerender	501	514	5000
Toggle	mount	835	804	5000
ToggleNext	mount	866	815	5000
button	mount	117	106	5000

Perf Analysis (Fluent)

Perf comparison

Status	Scenario	Fluent TPI	Fabric TPI	Ratio	Iterations	Ticks
🎯	Avatar.Fluent	0.44	0.44	1:1	2000	878
🦄	Button.Fluent	0.1	0.18	0.56:1	5000	507
🔧	Checkbox.Fluent	0.63	0.31	2.03:1	1000	631
🦄	Dialog.Fluent	0.15	0.22	0.68:1	5000	760
🔧	Dropdown.Fluent	2.87	0.44	6.52:1	1000	2865
🔧	Icon.Fluent	0.14	0.05	2.8:1	5000	699
🦄	Image.Fluent	0.07	0.11	0.64:1	5000	346
🔧	Slider.Fluent	1.59	0.35	4.54:1	1000	1594
🔧	Text.Fluent	0.06	0.03	2:1	5000	321
🦄	Tooltip.Fluent	0.1	17.34	0.01:1	5000	507

🔧 Needs work     🎯 On target     🦄 Amazing

Perf tests with no regressions

Scenario	Current PR Ticks	Baseline Ticks	Ratio
Icon.Fluent	699	626	1.12:1
GridMinimalPerf.default	321	293	1.1:1
IconMinimalPerf.default	633	577	1.1:1
AnimationMinimalPerf.default	395	370	1.07:1
DividerMinimalPerf.default	362	337	1.07:1
FlexMinimalPerf.default	257	241	1.07:1
LayoutMinimalPerf.default	372	349	1.07:1
ButtonMinimalPerf.default	174	164	1.06:1
FormMinimalPerf.default	382	360	1.06:1
ItemLayoutMinimalPerf.default	1227	1172	1.05:1
ListNestedPerf.default	856	819	1.05:1
Dialog.Fluent	760	725	1.05:1
AttachmentMinimalPerf.default	143	138	1.04:1
DropdownManyItemsPerf.default	774	742	1.04:1
InputMinimalPerf.default	1099	1054	1.04:1
MenuButtonMinimalPerf.default	1463	1413	1.04:1
RefMinimalPerf.default	206	198	1.04:1
Checkbox.Fluent	631	608	1.04:1
AttachmentSlotsPerf.default	1151	1121	1.03:1
AvatarMinimalPerf.default	466	452	1.03:1
ProviderMergeThemesPerf.default	1913	1852	1.03:1
TextMinimalPerf.default	323	313	1.03:1
ButtonSlotsPerf.default	596	587	1.02:1
ChatDuplicateMessagesPerf.default	427	419	1.02:1
LabelMinimalPerf.default	354	348	1.02:1
StatusMinimalPerf.default	638	626	1.02:1
TooltipMinimalPerf.default	732	717	1.02:1
AlertMinimalPerf.default	293	289	1.01:1
DialogMinimalPerf.default	754	747	1.01:1
EmbedMinimalPerf.default	1829	1809	1.01:1
HeaderMinimalPerf.default	339	334	1.01:1
ListMinimalPerf.default	428	424	1.01:1
LoaderMinimalPerf.default	723	714	1.01:1
ProviderMinimalPerf.default	855	843	1.01:1
RadioGroupMinimalPerf.default	393	389	1.01:1
TableManyItemsPerf.default	2074	2058	1.01:1
Avatar.Fluent	878	871	1.01:1
Slider.Fluent	1594	1584	1.01:1
ChatWithPopoverPerf.default	466	466	1:1
PopupMinimalPerf.default	646	643	1:1
ToolbarMinimalPerf.default	933	934	1:1
Dropdown.Fluent	2865	2877	1:1
CheckboxMinimalPerf.default	2873	2905	0.99:1
DropdownMinimalPerf.default	2979	2998	0.99:1
ListCommonPerf.default	903	908	0.99:1
ListWith60ListItems.default	1060	1067	0.99:1
ReactionMinimalPerf.default	341	345	0.99:1
TableMinimalPerf.default	366	370	0.99:1
CustomToolbarPrototype.default	3631	3653	0.99:1
Text.Fluent	321	325	0.99:1
Tooltip.Fluent	507	510	0.99:1
HierarchicalTreeMinimalPerf.default	383	392	0.98:1
ImageMinimalPerf.default	338	344	0.98:1
MenuMinimalPerf.default	800	819	0.98:1
SegmentMinimalPerf.default	302	309	0.98:1
SplitButtonMinimalPerf.default	3513	3576	0.98:1
TreeWith60ListItems.default	198	202	0.98:1
Button.Fluent	507	515	0.98:1
BoxMinimalPerf.default	332	343	0.97:1
CardMinimalPerf.default	520	538	0.97:1
CarouselMinimalPerf.default	439	453	0.97:1
TreeMinimalPerf.default	822	846	0.97:1
TextAreaMinimalPerf.default	450	471	0.96:1
Image.Fluent	346	361	0.96:1
SliderMinimalPerf.default	1493	1594	0.94:1
VideoMinimalPerf.default	565	600	0.94:1
ChatMinimalPerf.default	573	613	0.93:1
HeaderSlotsPerf.default	758	813	0.93:1
PortalMinimalPerf.default	116	128	0.91:1
AccordionMinimalPerf.default	124	140	0.89:1

[msft-github-bot]

🎉@uifabric/fabric-website@v7.13.0 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes
• Official NPM Release