Bump mockitoVersion from 5.4.0 to 5.5.0 in /Plan (#3177)

Bumps `mockitoVersion` from 5.4.0 to 5.5.0.

Updates `org.mockito:mockito-core` from 5.4.0 to 5.5.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v5.4.0...v5.5.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.4.0 to 5.5.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v5.4.0...v5.5.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Plan/build.gradle

@@ -103,7 +103,7 @@ subprojects {
         nkPlaceholderapiVersion = "1.4-SNAPSHOT"
 
         junitVersion = "5.10.0"
-        mockitoVersion = "5.4.0"
+        mockitoVersion = "5.5.0"
         testContainersVersion = "1.19.0"
         swaggerVersion = "2.2.15"
     }