chore: update/cleanup workflows

[ThirdEyeSqueegee]

Issue #, if available:
N/A

Description of changes:

Closes #263, #236, #234, #213

• Bump action versions
• Fix build workflow so that duplicate runs do not occur for PRs. Currently, the build workflow runs twice for each PR because it's set up to run on every push and PR
• Fix formatting

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.79%. Comparing base (6518849) to head (cfabd9c).
Report is 3 commits behind head on v2.

Additional details and impacted files

@@            Coverage Diff            @@
##                 v2     #269   +/-   ##
=========================================
  Coverage     24.79%   24.79%           
  Complexity       41       41           
=========================================
  Files            12       12           
  Lines           367      367           
  Branches         45       45           
=========================================
  Hits             91       91           
  Misses          273      273           
  Partials          3        3           

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