Make telemetry page visible in documentation sidebar

[Fashander]

Description

Closes #1392 .

Readiness checklist

• I added tests for new functionality or bugfixes.
• I ran task all, and it passed.
• I added/updated comments for both exported and unexported top-level declarations (functions, types, etc).
• I checked comments rendering with task godocs.
• I ensured that the title is good enough for the changelog.
• (for maintainers only) I set Reviewers (@FerretDB/core), Assignee, Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[vercel]

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Name	Status	Preview	Updated
ferret-db	✅ Ready (Inspect)	Visit Preview	Nov 15, 2022 at 9:48AM (UTC)

[codecov]

Codecov Report

Merging #1393 (2c2c5c4) into main (dab245d) will increase coverage by 7.69%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1393      +/-   ##
==========================================
+ Coverage   59.69%   67.38%   +7.69%     
==========================================
  Files         279      279              
  Lines       13353    13353              
==========================================
+ Hits         7971     8998    +1027     
+ Misses       4586     3424    -1162     
- Partials      796      931     +135     

Impacted Files	Coverage Δ
internal/util/version/version.go	48.52% <0.00%> (-4.42%)	⬇️
internal/handlers/common/filter.go	84.65% <0.00%> (ø)
integration/helpers.go	87.62% <0.00%> (+0.51%)	⬆️
internal/handlers/common/params.go	95.52% <0.00%> (+1.62%)	⬆️
integration/setup/common.go	93.89% <0.00%> (+4.58%)	⬆️
internal/handlers/tigris/tjson/schema.go	79.73% <0.00%> (+5.22%)	⬆️
integration/setup/setup.go	87.03% <0.00%> (+5.55%)	⬆️
internal/handlers/tigris/tigrisdb/collections.go	60.00% <0.00%> (+5.71%)	⬆️
integration/shareddata/shareddata.go	85.33% <0.00%> (+8.00%)	⬆️
integration/setup/setup_compat.go	86.61% <0.00%> (+11.02%)	⬆️
... and 33 more

Flag	Coverage Δ
integration	63.49% <ø> (+10.82%)	⬆️
mongodb	14.07% <ø> (-0.03%)	⬇️
pg	52.58% <ø> (-0.03%)	⬇️
tigris	35.34% <ø> (?)
unit	26.07% <ø> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

[rumyantseva]

LGTM

[noisersup]

LGTM, one thing aside:

|Sprint |❌ PR for project "Engineering" has "Sprint" field unset; it should be set. |