CI: set default permissions (#48)

Added permissions for read access to contents.

Signed-off-by: Bradley Reynolds <[email protected]>

Author: shenanigansd

.github/workflows/site-deploy.yaml

@@ -6,6 +6,9 @@ on:
       - main
   pull_request:
 
+permissions:
+      contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest