Allow manual build triggers (#99)

Author: ryan-rushton

.github/workflows/build.yml

@@ -19,6 +19,10 @@ on:
   # Trigger the workflow on any pull request
   pull_request:
 
+  # Allow manually triggering
+  workflow_dispatch:
+
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true