Fix PR doc upload (#2161)

Update deprecated GH action `upload-artifact@v3`

Author: regisss

.github/workflows/build_pr_documentation.yml

@@ -131,7 +131,7 @@ 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: optimum-doc-build/