possible issue with create_tcm() docs

Cheers everyone. I'm somewhat new to topic modeling and i came across this wonderful package, thank you guys for your work. While i was reading the docs in hope of creating a TCM i found the following example code:
```
tokens = word_tokenizer(tolower(movie_review$review))
it = itoken(tokens)
v = create_vocabulary(jobs)
vectorizer = vocab_vectorizer(v)
tcm = create_tcm(itoken(tokens), vectorizer, skip_grams_window = 3L)

```
where did jobs came from? could this be a typo? please let me know.

Start with the documentation example for create_tcm() shown in the issue and trace the variables used by the surrounding example. Confirm whether jobs is undefined or an intended object, then update the example so it is internally consistent and verify that the rendered documentation contains no remaining reference error.

Written by the indexing model from the issue text.