bedita github-workflows v2 and php 8.3

[didoda]

This updates github workflows to use bedita github-workflows v2 and php 8.3.
Bonus: add dependabot config to open automatically PR on action/codecov/docker updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.46%. Comparing base (dd0e271) to head (39e9d7f).

❗ Current head 39e9d7f differs from pull request most recent head 027f7d6. Consider uploading reports for the commit 027f7d6 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #49      +/-   ##
============================================
- Coverage     96.49%   96.46%   -0.04%     
  Complexity       81       81              
============================================
  Files             3        3              
  Lines           228      226       -2     
============================================
- Hits            220      218       -2     
  Misses            8        8              

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