Changes to Update collection metadata

the about request property type changed from object to no type

the hero request property type changed from object to no type

the overview request property type changed from object to no type

the logo_image_token request property's maxLength was set to 1000

removed the request property about/preview_media

removed the request property about/sections

removed the request property hero/desktop_hero_media

removed the request property hero/mobile_hero_media

removed the request property overview/modules

added AboutMetadataRequest subschema #2 to the about request property anyOf list

added HeroMetadataRequest subschema #2 to the hero request property anyOf list

added OverviewMetadataRequest subschema #2 to the overview request property anyOf list

the request property logo_image_token became nullable

added the media type */* for the response with the status 400

added the media type */* for the response with the status 403

added the media type */* for the response with the status 404

added the optional property code to the response with the 409 status