Update README.md

Author: Avaray

README.md

@@ -1,6 +1,6 @@
 # 🔐 SEN - Secure Encrypted Notepad
 
-**SEN** is a local-first text editor designed for security. It uses **keyfile-only authentication** instead of passwords, ensuring that your documents cannot be decrypted without physical access to your unique keyfile.
+**SEN** is a local-first GUI desktop application built in [Rust](https://rust-lang.org/), designed for security. It uses **keyfile-only authentication** instead of passwords, ensuring that your documents cannot be decrypted without physical access to your unique keyfile.
 
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