ci: add autogenerated rst files to .gitignore

[Bobbins228]

Issue link

What changes have been made

Verification steps

Follow the steps outlined in generate-documentation.md
Ensure no autogenerated rst files are marked by git as untracked.

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.12%. Comparing base (ac1a1dc) to head (09f9a10).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #753   +/-   ##
=======================================
  Coverage   94.12%   94.12%           
=======================================
  Files          36       36           
  Lines        2417     2417           
=======================================
  Hits         2275     2275           
  Misses        142      142           

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[KPostOffice]

/lgtm

Generated docs and whatnot, everything appeared untracked as expected

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: KPostOffice

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[Bobbins228]

@ChristianZaccaria can I get approval here just had to rebase branch

[ChristianZaccaria]

/lgtm