Changes to List avatars

for the query request parameter filter[id], the minLength was increased from 0 to 1

added the pattern ^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$ to the query request parameter filter[id]

the data/items/id response's property type changed from no type to string for status 200

for the query request parameter filter[id], the maxLength was set to 128

for the query request parameter filter[id], the type was generalized from no type to string

added the optional property data/items/suggested_voice_id to the response with the 200 status

removed subschema #1: Stock avatar ID subschema #2: Custom avatar ID from the data/items/id response property oneOf list for the response status 200

the data/items/id response's property pattern ^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$ was added for the status 200

endpoint added