Restore beman-tidy pre-commit hook unintentionally removed by e7f108c

This was an unintentional change caused by my automated update process
misinterpreting the commit
bemanproject/exemplar@068a39c
as meaning that beman-tidy should be removed from the pre-commit
config. I caught this problem elsewhere but missed it here.

Author: ednolan

.pre-commit-config.yaml

@@ -39,4 +39,10 @@ repos:
     hooks:
       - id: codespell
 
+  - repo: https://github.com/bemanproject/beman-tidy
+    rev: v0.3.1
+    hooks:
+    - id: beman-tidy
+      args: [".", "--verbose", "--require-all"]
+
 exclude: 'cookiecutter/|infra/'