Document moduleName option (Swift SDK) (#720)

Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>
Co-authored-by: Devin Logan <[email protected]>

Author: fern-api[bot]

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

@@ -5,7 +5,7 @@ description: Configuration options for the Fern Swift SDK.
 
 You can customize the behavior of the Swift SDK generator in `generators.yml`:
 
-```yaml {6-8} title="generators.yml"
+```yaml {6-9} title="generators.yml"
 groups:
   swift-sdk:
     generators:
@@ -14,6 +14,7 @@ groups:
         config:
           clientClassName: YourClientName
           environmentEnumName: YourCustomEnvironment
+          moduleName: MyCustomModule
 ```
 
 ## SDK Configuration Options
@@ -24,4 +25,8 @@ The name of the generated client class. This allows you to customize the class n
 
 <ParamField path="environmentEnumName" type="string" required={false} toc={true}>
 The name of the generated environment enum. This allows you to customize the enum name that defines your API environments (such as production, staging, development) and ensures consistent naming across SDK generations.
-</ParamField>
+</ParamField>
+
+<ParamField path="moduleName" type="string" required={false} toc={true}>
+The module name used in client code (e.g., `import MyCustomModule`). When provided, this name is used consistently across the library, product, and target.
+</ParamField>