ref(replay): update feature name (#70801)

For self-hosted users, replay details's Give Feedback button routes
feedback to our `feedback` project on issues:


https://github.com/getsentry/sentry/assets/56095982/30a3900a-e723-4e5e-a198-cb0cb9926ca5

This PR updates the feature name so that the title is `Replay
Self-Hosted` for more clarity. (Does not affect the zendesk widget for
SaaS users)



<img width="139" alt="SCR-20240513-lees"
src="https://github.com/getsentry/sentry/assets/56095982/bdaef6ff-440d-45d4-9035-88c729d1d2b5">
<img width="212" alt="SCR-20240513-leeh"
src="https://github.com/getsentry/sentry/assets/56095982/34f31f80-f95c-4e9e-8a40-c027bfba880c">

static/app/components/replays/header/feedbackButton.tsx

@@ -11,7 +11,7 @@ const FeedbackButtonHook = HookOrDefault({
 function FeedbackButton() {
   return (
     <FeedbackButtonHook>
-      <FeatureFeedback featureName="replay" buttonProps={{size: 'sm'}} />
+      <FeatureFeedback featureName="Replay Self-Hosted" buttonProps={{size: 'sm'}} />
     </FeedbackButtonHook>
   );
 }