ci: fix kvm permission denied

Author: AsakuraMizu

.github/workflows/test-template.yml

@@ -58,5 +58,9 @@ jobs:
         run: |
           make ARCH=${{ inputs.arch }} img
 
+      - name: Fix KVM permission
+        if: ${{ inputs.arch == 'x86_64' }}
+        run: sudo usermod -aG kvm $USER
+
       - name: Test
         run: scripts/ci-test.py ${{ inputs.arch }}