[DEVOPS-1786] Fix release pipeline for PHP SDK

[michalchecinski]

Type of change

- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [x] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Code changes

• .github/workflows/publish-php.yml: Add composer update in PHP setup to fix publish error.

Before you submit

• Please add unit tests where it makes sense to do so

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.39%. Comparing base (97d9e8c) to head (4109281).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #670   +/-   ##
=======================================
  Coverage   60.39%   60.39%           
=======================================
  Files         172      172           
  Lines       10553    10553           
=======================================
  Hits         6373     6373           
  Misses       4180     4180           

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