Links do not want the .md file extension

doc/accounts.md

@@ -298,4 +298,4 @@ ticket for you. The sponsor should [create a new ticket in GitLab](https://gitla
 
 ### Actually updating the keyring ###
 
-See the [new-user HOWTO](../howto/create-a-new-user.md).
+See the [new-user HOWTO](../howto/create-a-new-user).