issue-2304 remove tab index from accordion item content div on front end

[snovosel]

Description

This PR resolves an issue for keyboard users where the opened accordion would focus on the accordion body in the front end. As the area is not editable, it is unecessary.

Fixes #2304

Screenshots

Types of changes

Bug fix

How has this been tested?

manually

Acceptance criteria

Should not be able to tab focus the accordion body on the front end

Checklist:

• My code is tested
• My code follows accessibility standards
• My code has proper inline documentation
• I've included any necessary tests
• I've included developer documentation
• I've added proper labels to this pull request

[cypress]

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Test summary

404 • 0 • 2 • 0

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Run details

Project	CoBlocks
Status	Passed
Commit	0080170
Started	Mar 7, 2022 11:15 PM
Ended	Mar 7, 2022 11:20 PM
Duration	04:40 💡
OS	Linux Ubuntu - 20.04
Browser	Multiple

View run in Cypress Dashboard ➡️

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This comment has been generated by cypress-bot as a result of this project's GitHub integration settings. You can manage this integration in this project's settings in the Cypress Dashboard

[godaddy-wordpress-bot]

Performance Test Results:

index	master	issue-2304	change %
focus	133.93	106.52	-20.47%
inserterHover	37.9	37.88	-0.05%
inserterOpen	129.28	149.04	15.28%
inserterSearch	74.99	111.71	48.97%
load	23454.4	24235	3.33%
maxFocus	156.83	135.37	-13.68%
maxInserterHover	46.74	52.22	11.72%
maxInserterOpen	508.9	629.78	23.75%
maxInserterSearch	131.19	184.27	40.46%
maxType	84.84	81.24	-4.24%
minFocus	112.56	86.83	-22.86%
minInserterHover	32.79	30.57	-6.77%
minInserterOpen	70.16	75.56	7.7%
minInserterSearch	57.47	51.61	-10.2%
minType	38.86	41.9	7.82%
type	50.27	52.02	3.48%