ci: pin claude-code-action to v1.0.89 to fix Bedrock auth

v1.0.90 broke Bedrock OIDC auth — all Claude Code runs have been
failing with 403 since Apr 8.

Root cause: anthropics/claude-code-action#1196
Pinning to v1.0.89 (last working version) until upstream fix lands.

Author: KRRT7

.github/workflows/claude.yml

@@ -68,7 +68,7 @@ jobs:
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@v1.0.89
         with:
           use_bedrock: "true"
           use_sticky_comment: true
@@ -328,7 +328,7 @@ jobs:
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@v1.0.89
         with:
           use_bedrock: "true"
           claude_args: '--model us.anthropic.claude-sonnet-4-6 --allowedTools "Read,Edit,Write,Glob,Grep,Bash(git status*),Bash(git diff*),Bash(git add *),Bash(git commit *),Bash(git push*),Bash(git log*),Bash(git merge*),Bash(git fetch*),Bash(git checkout*),Bash(git branch*),Bash(uv run prek *),Bash(prek *),Bash(uv run ruff *),Bash(uv run pytest *),Bash(uv run mypy *),Bash(uv run coverage *),Bash(gh pr comment*),Bash(gh pr view*),Bash(gh pr diff*),Bash(gh pr merge*),Bash(gh pr close*)"'