build(deps): bump actions/upload-artifact from 6 to 7 (#345)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  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/e2e.yml

@@ -56,7 +56,7 @@ jobs:
           SESSION_SECRET: e2e-test-session-secret-long-enough
 
       - name: Upload Playwright report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: playwright-report
@@ -64,7 +64,7 @@ jobs:
           retention-days: 7
 
       - name: Upload test results
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: playwright-results

.github/workflows/test.yml

@@ -73,7 +73,7 @@ jobs:
         run: npm run test:coverage
 
       - name: Upload coverage report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: backend-coverage
@@ -118,7 +118,7 @@ jobs:
         run: npm run build
 
       - name: Upload coverage report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: always()
         with:
           name: frontend-coverage