Section 4: Typo

[Nat Sakimura]

Currently, it says:

This JSON [RFC7159] constitutes
the JWT Claims Set [RFC7519].  The JWS Claims Set is then signed,
encrypted, or signed and encrypted.

Change to

This JSON [RFC7159] constitutes
the JWT Claims Set defined in [RFC7519].  The JWT Claims Set is then signed,
encrypted, or signed and encrypted.

[Nat Sakimura]

Fixed #34 - typo.

→ <<cset 2fbd087066c1>>

[Nat Sakimura]

Fixed #34 additional typo.

→ <<cset 08122672e57b>>