Update README.md

Author: Alok-2002

README.md

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 Code Vault is an Android application developed using Android Studio that provides encryption and decryption of text using the Base64 algorithm and a secret key. 
 This app allows users to securely store and share sensitive information by encoding it into Base64 format with a secret key.
-![image](https://github.com/Alok-2002/Code_Vault_Android_App/assets/93814546/5ab9c02d-9402-43a8-b8b3-e96378cdcbc2)
+![image](https://github.com/Alok-2002/Code_Vault_Android_App/assets/93814546/b22753d1-de0d-4818-aee1-bdbf6e386312)
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 ## Features