Refine accessibilityHint (#7554)

* `accessibilityHint`

* accessibilityHint

* Update

Co-Authored-By: jason-me <mail@jason-hester.me>

* Update LoginForm.tsx

---------

Co-authored-by: jason-me <mail@jason-hester.me>

src/screens/VideoFeed/index.tsx

@@ -800,7 +800,7 @@ function Overlay({
                           : _(msg`Follow ${handle}`)
                       }
                       accessibilityHint={
-                        profile.viewer?.following ? _(msg`Unfollow user`) : ''
+                        profile.viewer?.following ? _(msg`Unfollows the user`) : ''
                       }
                       size="small"
                       variant="solid"
@@ -930,7 +930,7 @@ function ExpandableRichTextView({
       />
       {constrained && !screenReaderEnabled && (
         <Pressable
-          accessibilityHint={_(msg`Tap to expand or collapse post text.`)}
+          accessibilityHint={_(msg`Expands or collapses post text`)}
           accessibilityLabel={expanded ? _(msg`Read less`) : _(msg`Read more`)}
           hitSlop={HITSLOP_20}
           onPress={() => setExpanded(prev => !prev)}