Fix admonitions (#1973)

docs/email-clients.en.md

@@ -4,7 +4,7 @@ icon: material/email-open
 ---
 Our recommendation list contains email clients that support both [OpenPGP](encryption.md#openpgp) and strong authentication such as [Open Authorization (OAuth)](https://en.wikipedia.org/wiki/OAuth). OAuth allows you to use [Multi-Factor Authentication](basics/multi-factor-authentication.md) and prevent account theft.
 
-??? Attention "Email does not provide forward secrecy"
+??? warning "Email does not provide forward secrecy"
     When using end-to-end encryption (E2EE) technology like OpenPGP, email will still have [some metadata](email.md#email-metadata-overview) that is not encrypted in the header of the email.
 
     OpenPGP also does not support [forward secrecy](https://en.wikipedia.org/wiki/Forward_secrecy), which means if either your or the recipient's private key is ever stolen, all previous messages encrypted with it will be exposed: [How do I protect my private keys?](basics/email-security.md) Consider using a medium that provides forward secrecy:
@@ -84,7 +84,7 @@ These options can be found in :material-menu: → **Settings** → **Privacy & S
         - [:simple-appstore: App Store](https://apps.apple.com/app/id1236045954)
         - [:simple-windows11: Windows](https://canarymail.io/downloads.html)
 
-!!! attention
+!!! warning
 
     Canary Mail only recently released a Windows and Android client, though we don't believe they are as stable as their iOS and Mac counterparts.