Fix: Update GitHub Actions to use v4 of upload-artifact

- Updated actions/checkout from v3 to v4
- Updated actions/setup-node from v3 to v4
- Updated actions/upload-artifact from v3 to v4 (fixes deprecation warning)

Author: Thor011

.github/workflows/api-tests.yml

@@ -14,10 +14,10 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Setup Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: '18'
         cache: 'npm'
@@ -32,15 +32,15 @@ jobs:
       run: npm test
 
     - name: Upload test results
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: always()
       with:
         name: playwright-report
         path: playwright-report/
         retention-days: 7
 
     - name: Upload test results JSON
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: always()
       with:
         name: test-results