Deps: Update actions/upload-artifact action to v4.

Author: renovate[bot]

.github/workflows/upload-release.yml

@@ -31,7 +31,7 @@ jobs:
                   composer archive -vvv --format=zip --file="plugin-build/wp-graphql-bebuilder"
 
             - name: 🚛 Upload artifact
-              uses: actions/upload-artifact@v3
+              uses: actions/upload-artifact@v4
               with:
                   name: wp-graphql-bebuilder
                   path: plugin-build/wp-graphql-bebuilder.zip