feat(ci): simplify kubectl installation command in build-and-deploy workflow

.forgejo/workflows/build-and-deploy.yml

@@ -42,12 +42,10 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Install kubectl
-        run: >
+        run: |
           curl -LO "https://dl.k8s.io/release/$(curl -L -s
           https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
-
           chmod +x kubectl
-
           sudo mv kubectl /usr/local/bin/
       - name: Create Kubeconfig for Deployment
         run: |