tweak crd workflow permissions (#137)

Signed-off-by: Daniel Guns <danbguns@gmail.com>

Author: dgunzy

.github/workflows/check-crd-updates.yml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 permissions:
-  contents: read
+  contents: write
   pull-requests: write
 
 jobs: