Change anchor text size to `lg` from `xl` (#9185)

src/screens/PostThread/components/ThreadItemAnchor.tsx

···
                 enableTags
                 selectable
                 value={richText}
-                style={[a.flex_1, a.text_xl]}
+                style={[a.flex_1, a.text_lg]}
                 authorHandle={post.author.handle}
                 shouldProxyLinks={true}
               />