Add comment regarding workflow permissions

Co-authored-by: Brendan <2bndy5@gmail.com>

Author: tekktrik

.github/workflows/pre-commit.yml

@@ -9,6 +9,8 @@ on:
   push:
     branches: [main]
 
+# Do not inherit GITHUB_TOKEN permissions, for security purposes.
+# These will be explicitly granted per job (if/when needed)
 permissions: {}
 
 jobs: