fix(ci): replace action for upload the archive

- Substituted the `10up/action-wordpress-plugin-build-zip` with the `actions/upload-artifact@v4`.

.github/workflows/build-zip.yml

@@ -15,8 +15,13 @@ jobs:
     - name: Build plugin # modify this step as needed
       run: |
         composer install --no-dev
+        composer build wp2static.zip
 
-    - name: Generate zip
-      uses: 10up/action-wordpress-plugin-build-zip@stable
+    - name: Upload the archive as an artifact
+      id: upload-plugin-artifact
+      uses: actions/upload-artifact@v4
       with:
-        retention-days: 5 # Optional; defaults to 5
+        name: ${{ github.event.repository.name }}
+        path: wp2static.zip
+
+