Update render action to add permission as needed in other repos

Signed-off-by: Stephen Curran <[email protected]>

.github/workflows/render-specs.yml

@@ -13,6 +13,8 @@ on:
 jobs:
   build_spec:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  
     steps:
     - name: Checkout 🛎️
       uses: actions/checkout@v4