Update JWT claims registry to remove "." from examples of `salutation` and `title`

[Mark Haine]

https://www.iana.org/assignments/jwt/jwt.xhtml

salutation	End-User's salutation, e.g., "Mr."	[eKYC_and_Identity_Assurance_WG]	[OpenID Connect for Identity Assurance 1.0, Section 4]
title	End-User's title, e.g., "Dr."	[eKYC_and_Identity_Assurance_WG]	[OpenID Connect for Identity Assurance 1.0, Section 4]

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