upgrade CI versions

[sak-codes]

Fix some CI warnings like:

[test-ubuntu-py39-py310 (ubuntu-latest, 3.9)](https://github.com/codezonediitj/pydatastructs/actions/runs/5177706913/jobs/9328142768)
Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: actions/checkout@v2, actions/setup-python@v2. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.

[codecov]

Codecov Report

Merging #536 (dbb42ef) into main (bab603f) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #536   +/-   ##
=========================================
  Coverage   98.586%   98.586%           
=========================================
  Files           32        32           
  Lines         4173      4173           
=========================================
  Hits          4114      4114           
  Misses          59        59