Update composer docker tag to v2.5.5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
composer	final	patch	2.5.4 -> 2.5.5

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (fc98554) 100.00% compared to head (faa8be6) 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##                main       #82   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         3         3           
===========================================
  Files              3         3           
  Lines             17        17           
===========================================
  Hits              17        17           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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