Small update to python config code example (#20)

Author: devalog

fern/products/sdks/overview/python/configuration.mdx

@@ -5,7 +5,7 @@ description: Configuration options for the Fern Python SDK.
 
 You can customize the behavior of the Python SDK generator in `generators.yml`:
 
-```yaml {7-8}
+```yaml {7-9}
 default-group: local
 groups:
   local:
@@ -14,7 +14,7 @@ groups:
         version: 0.7.1
         config:
           client:
-            class_name: `YourClient` 
+            class_name: "YourClient" 
 ```
 
 ## SDK Configuration Options