More StandardValueSets for manifest creation

[jh480]

Hello,

please consider adding the more recent GenderIdentity & Pronoun to the StandardValueSet selection from sf project generate manifest.

Thanks!

[mshanemc]

wanna send a PR? https://github.com/forcedotcom/source-deploy-retrieve/blob/da3c97b3453c7ef5df13b378f9d327fde16f95f5/src/registry/stdValueSetRegistry.json