[release-1.11] Fix doc issues with slices

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2444

/assign jotak

[openshift-ci]

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[openshift-ci]

Hi @openshift-cherrypick-robot. Thanks for your PR.

I'm waiting for a netobserv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.22%. Comparing base (05e8389) to head (3f04cd1).
⚠️ Report is 1 commits behind head on release-1.11.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.11    #2448      +/-   ##
================================================
+ Coverage         72.15%   72.22%   +0.07%     
================================================
  Files               104      104              
  Lines             10619    10619              
================================================
+ Hits               7662     7670       +8     
+ Misses             2481     2475       -6     
+ Partials            476      474       -2     

Flag	Coverage Δ
unittests	72.22% <ø> (+0.07%)	⬆️

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

Files with missing lines	Coverage Δ
api/flowcollector/v1beta2/flowcollector_types.go	100.00% <ø> (ø)
...ollectorslice/v1alpha1/flowcollectorslice_types.go	100.00% <ø> (ø)

... and 4 files with indirect coverage changes

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[jotak]

/lgtm