update outdated actions

[thanodnl]

There is a wall of warnings on our Build & Test actions due to outdated nodejs versions being used by older github actions. This PR update these actions to newer versions to make the annotations on the summary more actionable.

Example: https://github.com/citusdata/citus/actions/runs/9906966082

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.71%. Comparing base (accb7d0) to head (f1a1691).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7656      +/-   ##
==========================================
+ Coverage   89.69%   89.71%   +0.01%     
==========================================
  Files         283      283              
  Lines       60507    60463      -44     
  Branches     7540     7539       -1     
==========================================
- Hits        54271    54243      -28     
+ Misses       4080     4064      -16     
  Partials     2156     2156