Update devcontainer.json

Author: hubwriter

.devcontainer/devcontainer.json

@@ -32,7 +32,7 @@
 	"postCreateCommand": "npm ci && npm run build",
 
 	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
-	"remoteUser": "node"
+	"remoteUser": "node",
 
 	// Test restricting low-spec machines
 	"hostRequirements": {