Update extensions.json

.vscode/extensions.json

@@ -2,8 +2,8 @@
     // See http://go.microsoft.com/fwlink/?LinkId=827846
     // for the documentation about the extensions.json format
     "recommendations": [
-        "ms-vscode.cpptools",
+		"ms-vscode.cpptools",
         "platformio.platformio-ide",
         "trunk.io"
     ],
-}
+}