docs: fix grammar in 03. Add Additional User(s).md

docs/user/01. Onboarding/02. Registration/03. Add Additional User(s).md

@@ -3,14 +3,14 @@
 #optional step#
 
 The 2nd step inside the registration form is optional. Means, the user can invite additional company members if support in the registration is needed.
-Normally this should only be relevant if an user is not authorized to finish the registration in the name of the company. E.g. missing rights to agree to terms and conditions or similar scenarios.  
+Normally this should only be relevant if a user is not authorized to finish the registration in the name of the company. E.g. missing rights to agree to terms and conditions or similar scenarios.  
 <br>
 <img width="366" alt="image" src="https://raw.githubusercontent.com/eclipse-tractusx/portal-assets/main/docs/static/registration-invite-user.png">
 
 <br<
 
-With the invite of an user, a personal message can get entered to ensure that the invited user knows the purpose of the invite.
-Below an example of the email send to the invited user is shared:
+With the invite of a user, a personal message can get entered to ensure that the invited user knows the purpose of the invite.
+Below an example of the email sent to the invited user can be found:
 
 <img width="450" alt="image" src="https://raw.githubusercontent.com/eclipse-tractusx/portal-assets/main/docs/static/invite-registration.png">