update kubeconform workflow to install findutils and improve manifest validation command

.gitea/workflows/kubeconform.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - name: Setup environment
         run: |
-          pacman -Syu --noconfirm kubeconform git
+          pacman -Syu --noconfirm kubeconform git findutils
       - name: Checkout code
         run: |
           git clone https://gitea.akshun-lab.cc/aggarwalakshun/k3s.git /mnt
       - name: Validate Manifests
         run: |
-          kubeconform -verbose -summary -schema-location default /mnt/**/*.yml
+          find /mnt -type f \( -iname "*.yml" -o -iname "*.yaml" \) -print0 | xargs -0 --no-run-if-empty kubeconform -verbose -summary -schema-location default