Update error handling middleware name

Author: Gayathri Sairamkrishnan

Sources/swift-openapi-generator/Documentation.docc/Proposals/SOAR-0011.md

@@ -87,8 +87,10 @@ extension HTTPResponseConvertible {
 #### Proposed Error Middleware
 
 The proposed error middleware in OpenAPIRuntime will convert the application error to the appropriate error response.
+ It returns 500 for application error(s) that do not conform to HTTPResponseConvertible protocol.
+
 ```swift
-public struct ErrorMiddleware: ServerMiddleware {
+public struct ErrorHandlingMiddleware: ServerMiddleware {
     func intercept(_ request: HTTPTypes.HTTPRequest, 
                    body: OpenAPIRuntime.HTTPBody?, 
                    metadata: OpenAPIRuntime.ServerRequestMetadata, 
@@ -131,7 +133,7 @@ extension MyAppError: HTTPResponseConvertible {
 
 ```swift
 let handler = try await RequestHandler()
-try handler.registerHandlers(on: transport, middlewares: [ErrorMiddleware()])
+try handler.registerHandlers(on: transport, middlewares: [ErrorHandlingMiddleware()])
 
 ```