allow releases to be retriggered on failure

This just gives us a manual rerun option.

Author: busterb

.github/workflows/release.yml

@@ -4,6 +4,7 @@ name: "Release"
 on:
   push:
     tags: [ "v*" ]
+  workflow_dispatch:
 
 concurrency:
   group: "${{ github.workflow }}-${{ github.event.number || github.ref }}"