Run UUID check on PR as well

Author: NobbZ

.github/workflows/uuid.yml

@@ -1,6 +1,6 @@
 name: Check UUID validity
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   uuid:
@@ -14,4 +14,4 @@ jobs:
           printf "Invalid UUID(s) found:"
           printf "%s" "${bad_uuid}"
           exit 1
-        fi
+        fi