Update deploy action with permissions information

Signed-off-by: Scott Kingsley Clark <lol@scottkclark.com>

Author: sc0ttkclark

.github/workflows/wordpress-plugin-deploy.yml

@@ -1,4 +1,7 @@
 name: Deploy to WordPress.org
+permissions:
+  id-token: write
+  attestations: write
 on:
   release:
     types: [published]