Update README.md

Author: AVidhanR

MAD_WEEK_19/README.md

@@ -122,4 +122,5 @@ public class MainActivity extends AppCompatActivity {
 
 That's it now save the both files and run the app!
 
-> **Note** :make sure to check the package name in java file `package com.example.emailsender;` if you got another name other than `emailsender` make sure to replace the first line of the code with yours.
+> [!NOTE]
+> Make sure to check the package name in java file `package com.example.emailsender;` if you got another name other than `emailsender` make sure to replace the first line of the code with yours.