Fix dayPeriod and timeZoneName in documentation

[dantman]

Globalize actually returns lower case dayperiod. But the documentation says dayPeriod.

This is confusing because Intl.DateTimeFormat's formatToParts does return dayPeriod but Globalize diverges from this and returns lower case dayperiod. This mistake in the documentation can lead to tricky bugs where a developer writes code according to the documentation checking for dayPeriod which doesn't work.

[jsf-clabot]

All committers have signed the CLA.

[dantman]

Additionally Globalize actually returns a zone part with zone info, not a timeZoneName part.

[rxaviers]

Thank you