Quick fix for post input not capitalizing the start of sentences (#8168) (#8173)

(cherry picked from commit 8eba95ad5c)

Co-authored-by: Daniel Espino García <larkox@gmail.com>

app/components/post_draft/post_input/post_input.tsx

@@ -335,6 +335,7 @@ export default function PostInput({
             underlineColorAndroid='transparent'
             textContentType='none'
             value={value}
+            autoCapitalize='sentences'
         />
     );
 }