fix: remove video & fix link (#83)

Removes the demo video that won't render on live site and fixes a broken
link

content/tutorials/signing-transactions-with-webauthn/10.index.md

@@ -27,9 +27,7 @@ To break this down, the app will allow users to:
 - Use WebAuthn to mint an NFT.
 - Have gasless transactions.
 
-:inline-video
-
-You can find the completed code inside the [Community Code repo](https://github.com/zkSync-Community-Hub/community-code/code/webauthn).
+You can find the completed code inside the [Community Code repo](https://github.com/zkSync-Community-Hub/community-code/tree/main/code/webauthn).
 
 ::callout{icon="i-heroicons-heart"}
 Special thanks to the [Clave](https://github.com/getclave) team for helping with this example.
@@ -40,8 +38,6 @@ Special thanks to the [Clave](https://github.com/getclave) team for helping with
 WebAuthn, short for Web Authentication API, is an API built-in to your browser that allows your app to register and authenticate users.
 It allows users to authenticate using [passkeys](https://passkeys.dev/docs/intro/what-are-passkeys/),
 including using biometric data (such as Apple's TouchID) or portable hardware devices (such as a Yubikey).
-You can see it working in the demo video above when the user
-transfers funds and mints an NFT.
 
 ### Ceremonies