github: prevent Claude from making commits during PR review

The workflow already uses contents: read which prevents GitHub from
accepting any push. The --disallowedTools setting adds a second layer
by stopping Claude from even attempting git write operations.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Link: https://github.com/openwrt/openwrt/pull/22897
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

.github/workflows/claude-code-review.yml

@@ -33,3 +33,4 @@ jobs:
           trigger_phrase: "/claude"
           claude_args: >-
             --allowedTools "mcp__github_inline_comment__create_inline_comment"
+            --disallowedTools "Bash(git add:*),Bash(git commit:*),Bash(git rm:*),Bash(git push:*)"