docs(workflow): Clarify only gh issue list/view commands available

Add explicit note in "Shell Commands Available" section:
- You can ONLY use gh issue list and gh issue view
- You CANNOT use gh issue edit, comment, close, or other gh commands

Makes it crystal clear which gh commands are available vs restricted.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: julienld

.github/workflows/gemini-triage.yml

@@ -405,6 +405,7 @@ jobs:
             **Shell Commands Available:**
             - `gh issue list --search "query"` - Find similar issues in this repo
             - `gh issue view <number>` - Check specific issue details
+            - **NOTE**: You can ONLY use `gh issue list` and `gh issue view`. You CANNOT use `gh issue edit`, `gh issue comment`, `gh issue close`, or any other gh commands.
             - `grep -r "pattern" src/ --include="*.py"` - Search codebase for error messages, function names
             - `find src/ -name "*.py" -type f` - Find Python files
             - `cat <path>` - Read file content (only paths found via grep/find)