doc: Add missing *-operator to nlp.disable_pipes()
doc: Add missing *-operator to nlp.disable_pipes()

I'm using SpaCy version 2.0.3. If I don't use the *-operator in the example, Python throws an error message. With the operator it works fine. Also according to the documentation of the function `nlp.disable_pipes()`, it expects one or more strings as arguments and not one argument being a list of strings.
spacy-io/spaCy,spacy-io/spaCy,explosion/spaCy,aikramer2/spaCy,recognai/spaCy,explosion/spaCy,explosion/spaCy,spacy-io/spaCy,aikramer2/spaCy,honnibal/spaCy,aikramer2/spaCy,aikramer2/spaCy,aikramer2/spaCy,honnibal/spaCy,recognai/spaCy,honnibal/spaCy,aikramer2/spaCy,recognai/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,recognai/spaCy,spacy-io/spaCy,explosion/spaCy,recognai/spaCy,spacy-io/spaCy,recognai/spaCy,explosion/spaCy