fix(site): Rename 'change bench' to 'change bench group'

[tanmoysrt]

It's temporary changes, whole section is getting revamped

[mergify]

@tanmoysrt, thanks for the contribution, but we do not accept pull requests on a master. Please close this PR and raise PR on an develop branch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.65%. Comparing base (68cd9e5) to head (92f93bd).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5307   +/-   ##
=======================================
  Coverage   50.65%   50.65%           
=======================================
  Files         844      844           
  Lines       68723    68723           
  Branches      274      274           
=======================================
  Hits        34815    34815           
  Misses      33887    33887           
  Partials       21       21           

Flag	Coverage Δ
dashboard	72.79% <ø> (ø)

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