RSDK-9518: upgrade upload artifact to v4 (#804)

Author: purplenicole730

.github/workflows/docs.yml

@@ -33,7 +33,7 @@ jobs:
           uv run make documentation
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: html-docs
           path: docs/_build/html/

.github/workflows/linkcheck.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           config: .htmltest.yml
       - name: Archive htmltest results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         # Note: Set ACTIONS_RUNTIME_TOKEN env variable to test with nektos/act
         with:
           name: htmltest-report