chore: clean up some of the pronoun implementation (#5583)

src/Application.hpp

@@ -173,7 +173,7 @@ private:
     std::unique_ptr<ILinkResolver> linkResolver;
     std::unique_ptr<IStreamerMode> streamerMode;
     std::unique_ptr<ITwitchUsers> twitchUsers;
-    std::shared_ptr<pronouns::Pronouns> pronouns;
+    std::unique_ptr<pronouns::Pronouns> pronouns;
 #ifdef CHATTERINO_HAVE_PLUGINS
     std::unique_ptr<PluginController> plugins;
 #endif