Run for PRs

Then we know if we break things.

Author: martincostello

.github/workflows/oats.yml

@@ -7,10 +7,9 @@ on:
       - '**/*.gitattributes'
       - '**/*.gitignore'
       - '**/*.md'
-  workflow_dispatch:
-  # TODO Remove once fixed
   pull_request:
     branches: [ main ]
+  workflow_dispatch:
 
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