Bump gradle/actions from 4 to 5

Bumps [gradle/actions](https://github.com/gradle/actions) from 4 to 5.
- [Release notes](https://github.com/gradle/actions/releases)
- [Commits](gradle/actions@v4...v5)

---
updated-dependencies:
- dependency-name: gradle/actions
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-fitnesse.yml

@@ -19,12 +19,12 @@ jobs:
           distribution: 'zulu'
           java-version: ${{ matrix.java-version }}
       - name: Validate Gradle wrapper
-        uses: gradle/actions/wrapper-validation@v4
+        uses: gradle/actions/wrapper-validation@v5
       - name: Remove Java 21 incompatible tests
         if: ${{ matrix.java-version == '21' }}
         run: rm -rf FitNesseRoot/FitNesse/SuiteAcceptanceTests/SuiteSlimTests/SystemExitIsPrevented
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v5
         with:
           # Only write to the cache for builds on the 'master' branch.
           # Builds on other branches will only read existing entries from the cache.