chore(deps): Bump mockito from 5.18.0 to 5.20.0

Bumps `mockito` from 5.18.0 to 5.20.0.

Updates `org.mockito:mockito-core` from 5.18.0 to 5.20.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.20.0)

Updates `org.mockito:mockito-junit-jupiter` from 5.18.0 to 5.20.0
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.18.0...v5.20.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-version: 5.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.mockito:mockito-junit-jupiter
  dependency-version: 5.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ opentelemetry-contrib = "1.49.0-alpha"
 opentelemetry-android = "0.15.0-alpha"
 opentelemetry-api = "1.55.0"
 
-mockito = "5.18.0"
+mockito = "5.20.0"
 junit = "5.13.3"
 byteBuddy = "1.17.6"
 spotless = "8.0.0"