switch to workflow_call instead of workflow_dispatch

Author: martinlippert

.github/workflows/create-gh-release.yml

@@ -1,7 +1,7 @@
 name: Create Release
 
 on:
-  workflow_dispatch:
+  workflow_call:
     inputs:
       version:
         description: Github release marker, i.e. 4.20.1.RELEASE
@@ -64,4 +64,4 @@ jobs:
           release_name: ${{ inputs.version }}
           body_path: ${{ github.workspace }}/gen-changelog.md
           draft: true
-          prerelease: false
+          prerelease: false