[AI] Fix documentation generation warnings (#15892)

Author: andrewheard

FirebaseAI/Sources/FirebaseAI.swift

@@ -29,7 +29,7 @@ public final class FirebaseAI: Sendable {
   ///
   /// - Parameters:
   ///   - app: A custom `FirebaseApp` used for initialization; if not specified, uses the default
-  ///     ``FirebaseApp``.
+  ///     `FirebaseApp`.
   ///   - backend: The backend API for the Firebase AI SDK; if not specified, uses the default
   ///     ``Backend/googleAI()`` (Gemini Developer API).
   ///   - useLimitedUseAppCheckTokens: When sending tokens to the backend, this option enables

FirebaseAI/Sources/Types/Public/Live/LiveSession.swift

@@ -19,7 +19,7 @@ import Foundation
 /// Messages are streamed through ``LiveSession/responses``, and can be sent through either the
 /// dedicated realtime API function (such as ``LiveSession/sendAudioRealtime(_:)`` and
 /// ``LiveSession/sendTextRealtime(_:)``), or through the incremental API (such as
-/// ``LiveSession/sendContent(_:turnComplete:)-6x3ae``).
+/// ``LiveSession/sendContent(_:turnComplete:)-(PartsRepresentable...,_)``).
 ///
 /// To create an instance of this class, see ``LiveGenerativeModel``.
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)