Update no-commit-to-branch hook to guard main instead of master

The repository's default branch is 'main'; there is no 'master' branch,
so the no-commit-to-branch pre-commit hook was guarding a nonexistent
branch.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: antonwolfy

.pre-commit-config.yaml

@@ -6,7 +6,7 @@ repos:
     - id: check-added-large-files
     - id: no-commit-to-branch
       name: "ensure no direct commit to master/maintenance branches"
-      args: [--branch, "master", --pattern, "maintenance/.*"]
+      args: [--branch, "main", --pattern, "maintenance/.*"]
     - id: check-case-conflict
     - id: check-illegal-windows-names
   # Contents