chore: update GitHub Actions to use upload and download artifact v4

Author: kneerose

.github/workflows/test_backend.yml

@@ -62,7 +62,7 @@ jobs:
 
       - name: Upload report
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: allure-results
           path: tests/govtool-backend/allure-results
@@ -74,7 +74,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download results
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: allure-results
           path: allure-results

.github/workflows/test_integration_playwright.yml

@@ -81,14 +81,14 @@ jobs:
           npm test
 
       - name: Upload report
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: allure-results
           path: tests/govtool-frontend/playwright/allure-results
 
       - name: Upload lock logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: lock-logs
@@ -114,7 +114,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download report
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: allure-results
           path: allure-results