Add explicit permissions to typos workflow for security

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

Author: Copilot

.github/workflows/typos.yml

@@ -6,6 +6,9 @@ on:
       - main
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   typos:
     name: Spell Check with Typos