remove trailing blanks

Co-authored-by: Rafal Artych <[email protected]>

code/API_definitions/number-verification.yaml

@@ -15,7 +15,7 @@ info:
     Please see the CAMARA-Security-Interoperability.md on the format of the login_hint value for operator tokens.
 
     How an operator token is obtained is outside the scope.
-    
+ 
     The NumberVerification API verifes possession of a phone number in the background without requiring user interaction.
     There are neither OTPs (One-time passwords) received by SMS nor authenticator app downloads, so it is much simpler. 
     It can be used at sign up, login, or transaction time to validate that a user's SIM (Subscriber Identity Module) is both actively connected to the mobile network and not spoofed or cloned.