chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	pinDigest	-> 11bd719
actions/upload-artifact	action	pinDigest	-> ea165f8
codecov/codecov-action	action	pinDigest	-> 18283e0
codecov/test-results-action	action	pinDigest	-> 47f89e9
docker.io/library/ruby	final	pinDigest	-> 342bfeb
docker/dockerfile	syntax	pinDigest	-> b6afd42
ghcr.io/rails/devcontainer/images/ruby	final	pinDigest	-> a3a0d62
postgres		pinDigest	-> 09f23e0
redis		pinDigest	-> 7069f66
selenium/standalone-chromium		pinDigest	-> 8745c65

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (3d58786) to head (5781136).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #504   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          109       109           
  Lines         2359      2359           
  Branches        72        72           
=========================================
  Hits          2359      2359           

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