Bump composer/ca-bundle from 1.5.4 to 1.5.5 (#1450)

Bumps [composer/ca-bundle](https://github.com/composer/ca-bundle) from 1.5.4 to 1.5.5.
- [Release notes](https://github.com/composer/ca-bundle/releases)
- [Commits](composer/ca-bundle@1.5.4...1.5.5)

---
updated-dependencies:
- dependency-name: composer/ca-bundle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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