fix: use != '' instead of != null to correctly guard ANTHROPIC_API_KEY check

Agent-Logs-Url: https://github.com/kimocoder/wifite2/sessions/1438d4a6-2a23-453f-961d-d03dda4e2b7d

Co-authored-by: kimocoder <4252297+kimocoder@users.noreply.github.com>

Author: Copilot

.github/workflows/claude.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   claude:
-    if: ${{ secrets.ANTHROPIC_API_KEY != null && vars.CLAUDE_CODE_ENABLED != 'false' }}
+    if: ${{ secrets.ANTHROPIC_API_KEY != '' && vars.CLAUDE_CODE_ENABLED != 'false' }}
     runs-on: ubuntu-latest
     permissions:
       id-token: write