Fix avatar scaling issue in wide card and profile activity page (#6503) (#6778)

- Adjusted CSS to correct the compression of the profile avatar in the wide card and profile activity page.
- Ensured the avatar scales properly, aligning with the expected behavior seen in the standard profile picture view.
- Tested on Chrome (Brave browser) to confirm the fix.

src/components/UserPublicProfile/UserPublicProfileHeader.tsx

@@ -27,7 +27,7 @@ export function UserPublicProfileHeader(props: UserPublicProfileHeaderProps) {
             : '/images/default-avatar.png'
         }
         alt={name}
-        className="h-32 w-32 rounded-full"
+        className="h-32 w-32 object-cover rounded-full"
       />
 
       <div>