chore(deps): bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  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-backend.yml

@@ -32,7 +32,7 @@ jobs:
           cache: "maven"
 
       - name: Cache Maven packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}

.github/workflows/build-client.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           node-version: "14"
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}