Documentation for Appendable Attributes

[remarcbalisi]

https://orator-orm.com/docs/0.9/orm.html#appendable-attributes

The example code for appending attributes uses __append__ but it should be __appends__.

[alfonsocv12]

The documentation isn't open source :(

[josephmancuso]

Orator docs can be found here https://github.com/orator-orm/docs

[alfonsocv12]

I fix the issue but i don't think it will get approved @remarcbalisi my pull request