Bump playframework/.github from 3 to 4

Bumps [playframework/.github](https://github.com/playframework/.github) from 3 to 4.
- [Release notes](https://github.com/playframework/.github/releases)
- [Commits](playframework/.github@v3...v4)

---
updated-dependencies:
- dependency-name: playframework/.github
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-test.yml

@@ -15,7 +15,7 @@ concurrency:
 jobs:
   tests:
     name: Tests
-    uses: playframework/.github/.github/workflows/cmd.yml@v3
+    uses: playframework/.github/.github/workflows/cmd.yml@v4
     with:
       java: 21, 17, 11
       scala: 2.13.x, 3.x
@@ -26,4 +26,4 @@ jobs:
     if: github.event_name == 'pull_request'
     needs: # Should be last
       - "tests"
-    uses: playframework/.github/.github/workflows/rtm.yml@v3
+    uses: playframework/.github/.github/workflows/rtm.yml@v4