Bump phoenix-actions/test-reporting from 12 to 15 (#3408)

Bumps [phoenix-actions/test-reporting](https://github.com/phoenix-actions/test-reporting) from 12 to 15.
- [Release notes](https://github.com/phoenix-actions/test-reporting/releases)
- [Changelog](https://github.com/phoenix-actions/test-reporting/blob/main/CHANGELOG.md)
- [Commits](phoenix-actions/test-reporting@41efe7e...f957cd9)

---
updated-dependencies:
- dependency-name: phoenix-actions/test-reporting
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/agp-matrix.yml

@@ -82,7 +82,7 @@ jobs:
             **/build/outputs/mapping/release/*
 
       - name: Test Report
-        uses: phoenix-actions/test-reporting@41efe7ebebe7ef156ef46f6b0acf50ec0f10315b # pin@v12
+        uses: phoenix-actions/test-reporting@f957cd93fc2d848d556fa0d03c57bc79127b6b5e # pin@v15
         if: always()
         with:
           name: JUnit AGP ${{ matrix.agp }} - Integrations ${{ matrix.integrations }}

.github/workflows/build.yml

@@ -50,7 +50,7 @@ jobs:
             **/build/reports/*
 
       - name: Test Report
-        uses: phoenix-actions/test-reporting@41efe7ebebe7ef156ef46f6b0acf50ec0f10315b # pin@v12
+        uses: phoenix-actions/test-reporting@f957cd93fc2d848d556fa0d03c57bc79127b6b5e # pin@v15
         if: always()
         with:
           name: JUnit Build

.github/workflows/system-tests-backend.yml

@@ -71,7 +71,7 @@ jobs:
             spring-server.txt
 
       - name: Test Report
-        uses: phoenix-actions/test-reporting@41efe7ebebe7ef156ef46f6b0acf50ec0f10315b # pin@v12
+        uses: phoenix-actions/test-reporting@f957cd93fc2d848d556fa0d03c57bc79127b6b5e # pin@v15
         if: always()
         with:
           name: JUnit System Tests ${{ matrix.sample }}