fix: wrong attribute reference in minty yaml (#135)

Author: bradegler

.github/minty.yaml

@@ -3,7 +3,7 @@ version: 'minty.abcxyz.dev/v2'
 rule:
   if: |-
     assertion.iss == 'https://token.actions.githubusercontent.com' &&
-    assertion.organization_id == '93787867' &&
+    assertion.repository_owner_id == '93787867' &&
     assertion.repository_id == '560465650' &&
     assertion.ref == 'refs/heads/main'