Update default version in packages workflow

The default version in the GitHub Actions workflow for package generation has been updated. The version number has been changed from 3.0.1-preview to 3.0.4-preview. This will reflect in the published client packages when a specific version tag is not provided.

.github/workflows/packages.yml

@@ -31,7 +31,7 @@ jobs:
             TAG_NAME=${TAG_NAME#refs/tags/} # remove the refs/tags/ prefix
             echo "VERSION=${TAG_NAME}" >> $GITHUB_ENV
           else
-            echo "VERSION=3.0.1-preview.${{github.run_number}}" >> $GITHUB_ENV
+            echo "VERSION=3.0.4-preview.${{github.run_number}}" >> $GITHUB_ENV
           fi
       - name: Build workflow designer client assets
         working-directory: ./src/modules/Elsa.Studio.Workflows.Designer/ClientLib