fix: trigger workflow on changes to workflow files

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

.gitea/workflows/deploy-proxmox-infra.yaml

@@ -6,11 +6,13 @@ on:
       - main
     paths:
       - 'proxmox-infra/**'
+      - '.gitea/workflows/**'
   pull_request:
     branches:
       - main
     paths:
       - 'proxmox-infra/**'
+      - '.gitea/workflows/**'
 
 jobs:
   preview: