feat(frontend): update landing page text item (#3224)

# Motivation

Requested text update.

<img width="1587" alt="Screenshot 2024-10-29 at 18 37 11"
src="https://github.com/user-attachments/assets/9201a9fb-2c85-488b-bb0a-b61291ec32a3">

src/frontend/src/lib/i18n/en.json

@@ -62,7 +62,7 @@
 			"authenticate": "Open or Create",
 			"asset_types": "Bitcoin, Ethereum, ICP and more",
 			"instant_and_private": "Instant and private access anywhere",
-			"advanced_cryptography": "Peace of mind through advanced cryptography"
+			"advanced_cryptography": "100% onchain: peace of mind through advanced cryptography"
 		},
 		"alt": {
 			"sign_in": "Sign in with Internet Identity to start using $oisy_name.",