fix(ci): update upload/artifact to v4 in doc builder

Author: tengomucho

.github/workflows/doc-pr-build.yml

@@ -49,7 +49,7 @@ jobs:
           echo ${{ env.COMMIT_SHA }} > ./commit_sha
           echo ${{ env.PR_NUMBER }} > ./pr_number
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: doc-build-artifact
           path: tpu-doc-build/