docs: remove sidebar changelog

[TC-MO]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.38%. Comparing base (cb94cb1) to head (13fcfa5).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #731      +/-   ##
==========================================
- Coverage   95.58%   95.38%   -0.20%     
==========================================
  Files          45       45              
  Lines        5115     5115              
==========================================
- Hits         4889     4879      -10     
- Misses        226      236      +10     

Flag	Coverage Δ
integration	95.38% <ø> (-0.20%)	⬇️

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[vdusek]

Same as in the SDK.

1. The sidebar disappears completely on the Changelog page. And it looks like it's being shifted to the left when navigating between Docs, Reference, and Changelog.

2. The Changelog button does not appear in a pressed/active state when the Changelog page is selected (see screenshot).

[TC-MO]

Converting back to draft till other fixes land first