Bump configuration-as-code-plugin.version in /bom-weekly

Bumps `configuration-as-code-plugin.version` from 1.54 to 1.55.

Updates `configuration-as-code` from 1.54 to 1.55
- [Release notes](https://github.com/jenkinsci/configuration-as-code-plugin/releases)
- [Commits](jenkinsci/configuration-as-code-plugin@configuration-as-code-1.54...configuration-as-code-1.55)

Updates `test-harness` from 1.54 to 1.55
- [Release notes](https://github.com/jenkinsci/configuration-as-code-plugin/releases)
- [Commits](jenkinsci/configuration-as-code-plugin@configuration-as-code-1.54...configuration-as-code-1.55)

---
updated-dependencies:
- dependency-name: io.jenkins:configuration-as-code
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.jenkins.configuration-as-code:test-harness
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

bom-weekly/pom.xml

@@ -10,7 +10,7 @@
     <packaging>pom</packaging>
     <properties>
         <checks-api.version>1.7.2</checks-api.version>
-        <configuration-as-code-plugin.version>1.54</configuration-as-code-plugin.version>
+        <configuration-as-code-plugin.version>1.55</configuration-as-code-plugin.version>
         <git-plugin.version>4.10.0</git-plugin.version>
         <pipeline-model-definition-plugin.version>1.9.3</pipeline-model-definition-plugin.version>
         <scm-api-plugin.version>2.6.5</scm-api-plugin.version>