fix(ci): use beta version for slash commands support

Switch from @v1 to @beta to enable experimental_slash_commands_dir
parameter which is required for slash commands to work properly

Author: zealoushacker

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

@@ -23,7 +23,7 @@ jobs:
           fetch-depth: 0
 
       - name: Run Claude Link Review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@beta
         with:
           use_sticky_comment: true
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

.github/workflows/claude-model-check.yml

@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
 
       - name: Claude Model Validation
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@beta
         with:
           use_sticky_comment: true
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

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

@@ -23,7 +23,7 @@ jobs:
           fetch-depth: 0
 
       - name: Run Claude Notebook Review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@beta
         with:
           use_sticky_comment: true
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}