remove accidentally-copied microk8s prefix

Author: emma-sg

.github/workflows/k3d-nightly-ci.yaml

@@ -94,7 +94,7 @@ jobs:
           version: 3.10.2
 
       - name: Create Secret
-        run: sudo microk8s kubectl create secret generic btrix-subs-app-secret \
+        run: kubectl create secret generic btrix-subs-app-secret \
           --from-literal=BTRIX_SUBS_APP_URL=${{ env.ECHO_SERVER_HOST_URL }} \
           --from-literal=BTRIX_SUBS_APP_KEY=TEST_PRESHARED_SECRET_PASSWORD