github: pin claude-code-action to v1.0.49

Version 1.0.49 added support for PRs from forked repositories.
This feature was reverted in v1.0.50, see:
https://github.com/anthropics/claude-code-action/pull/937

v1.0.49 broke commits made by Claude, but we do not use that
feature. Pin to v1.0.49 until
https://github.com/anthropics/claude-code-action/pull/963 is merged
and released.

Fixes: c0e75c9de6 ("github: add Claude code review workflow triggered by /claude comment")
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

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

@@ -26,7 +26,7 @@ jobs:
           fetch-depth: 1
 
       - name: PR Review
-        uses: anthropics/claude-code-action@6062f3709600659be5e47fcddf2cf76993c235c2 # v1
+        uses: anthropics/claude-code-action@f669191d7d1e67f08a54b0c11cf5683a9a391951 # v1.0.49
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           github_token: ${{ secrets.GITHUB_TOKEN }}