[dd-admin] Fix email schemas in certain API endpoints

Dot character was not being properly escaped, we switch to using
bracket expressions to avoid possible future issues.

dd-sso/admin/src/admin/schemas/mail.yml

@@ -26,7 +26,7 @@ name:
 email:
   type: string
   required: true
-  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$
+  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+[.][a-zA-Z0-9-.]+$
 inbound_host:
   type: string
   required: true
@@ -50,4 +50,4 @@ outbound_ssl_mode:
   default: ssl
 outbound_user:
   type: string
-  required: true
+  required: true

dd-sso/admin/src/admin/schemas/mails.yml

@@ -29,7 +29,7 @@ mails:
     email:
       type: string
       required: true
-      regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$
+      regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+[.][a-zA-Z0-9-.]+$
     inbound_host:
       type: string
       required: true
@@ -53,4 +53,4 @@ mails:
       default: ssl
     outbound_user:
       type: string
-      required: true
+      required: true

dd-sso/admin/src/admin/schemas/user.yml

@@ -29,7 +29,7 @@ last:
 email:
   required: true
   type: string
-  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+$
+  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+[.][a-zA-Z0-9-.]+$
 password:
   required: true
   type: string

dd-sso/admin/src/admin/schemas/user_update.yml

@@ -26,7 +26,7 @@ last:
 email:
   required: false
   type: string
-  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+$
+  regex: ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+[.][a-zA-Z0-9-.]+$
 password:
   required: false
   type: string