update kubeconform.yml to specify exact path for crd.yml exclusion

.gitea/workflows/kubeconform.yml

@@ -6,7 +6,7 @@ on:
       - '**.yml'
       - '**.yaml'
       - '!.gitea/workflows/**'
-      - '!clusters/**/system-upgrade/crd.yml'
+      - '!clusters/default/system-upgrade/crd.yml'
 
 jobs:
   kubeconform:
@@ -39,7 +39,7 @@ jobs:
           files: |
             **.yml
             !.gitea/workflows/**
-            !clusters/**/system-upgrade/crd.yml
+            !clusters/default/system-upgrade/crd.yml
 
       - name: Validate Manifests
         if: steps.changed-files.outputs.any_changed == 'true'