add missing labels

Author: jyecusch

src/pages/index.mdx

@@ -38,13 +38,13 @@ Resources are the building blocks of your apps. They're the databases, queues, b
 
 <CodeGroup>
 
-```javascript
+```javascript {{ label:"services/example.js" }}
 import { bucket } from '@nitric/sdk'
 
 const profiles = bucket('profiles').allow('read', 'write', 'delete')
 ```
 
-```python
+```python {{ label:"services/example.py" }}
 from nitric.resources import bucket
 from nitric.application import Nitric
 
@@ -53,7 +53,7 @@ profiles = bucket('profiles').allow('read', 'write', 'delete')
 Nitric.run()
 ```
 
-```go
+```go {{ label:"services/example/main.go" }}
 import (
 	"fmt"
 
@@ -69,7 +69,7 @@ func main() {
 }
 ```
 
-```dart
+```dart {{ label:"services/example.dart" }}
 import 'package:nitric_sdk/nitric.dart';
 
 final profiles = Nitric.bucket("profiles").allow([