Update base_version to 3.7.0 in GitHub workflow configuration.

Author: sfmskywalker

.github/workflows/packages.yml

@@ -17,7 +17,7 @@ on:
     types: [prereleased, published]
 
 env:
-  base_version: '3.6.0'
+  base_version: '3.7.0'
   feedz_feed_source: 'https://f.feedz.io/elsa-workflows/elsa-3/nuget/index.json'
   nuget_feed_source: 'https://api.nuget.org/v3/index.json'