Add dependabot configuration for CI and update CI actions

[m-fila]

• Updated outdated actions used in CI workflow
• Added dependabot configuration to get updates for github actions: https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates#enabling-dependabot-version-updates

This should silence annotation warnings about using deprecated version of Node in actions

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.18%. Comparing base (1b245ba) to head (f3f5b5d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #86   +/-   ##
=======================================
  Coverage   70.18%   70.18%           
=======================================
  Files          17       17           
  Lines        1164     1164           
=======================================
  Hits          817      817           
  Misses        347      347           

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