Update corpus-analysis-with-spacy.md

[anisa-hawes]

I'm correcting the spelling of cited author's name, (line 869).

Closes #3594

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[anisa-hawes]

Hello Alex @hawc2,

A quick PR to correct a mistake in one of the endnotes in corpus-analysis-with-spacy. An author whose work is cited noted that their surname was spelled incorrectly !