docs: add more cases for generating new libraries

[cuiy0006]

1. Added one more case when we need to update the googleapis SHA.

2. Added a description of the error we expected when running check-api-pr

3. Replace bazel with bazelisk in case the lastest bazel version is not available via apt get install.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.27%. Comparing base (bf3bf1c) to head (f9d5aad).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14806      +/-   ##
==========================================
- Coverage   93.27%   93.27%   -0.01%     
==========================================
  Files        2319     2319              
  Lines      208231   208231              
==========================================
- Hits       194237   194227      -10     
- Misses      13994    14004      +10     

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