chore: update upload-artifact GH action to v4 (#2863)

Signed-off-by: dkwon17 <[email protected]>

Author: dkwon17

Diff for: .github/workflows/build-and-validate-on-pr.yaml

@@ -54,7 +54,7 @@ jobs:
           echo "${{ github.event.pull_request.head.sha }}" > PR_SHA
 
       - name: Upload artifact doc-content
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: doc-content
           path: |

Diff for: .github/workflows/build-and-validate-on-push.yaml

@@ -50,7 +50,7 @@ jobs:
         run: CI=true antora generate antora-playbook-for-development.yml --stacktrace --log-failure-level=warn
 
       - name: Upload artifact doc-content
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: doc-content
           path: build/site