code object names inconsistent in textstat_collocations()

[kbenoit]

A user reports:

"This morning, I got stuck on this example:

https://tutorials.quanteda.io/advanced-operations/compound-mutiword-expressions/ which creates "tstat_col_cap"

I ran the earlier example:

https://tutorials.quanteda.io/statistical-analysis/collocation/

That started similarly but created "tstat_col_caps" with an "s" on the end. Rather than start over, I just pasted the change onto the bottom, which didn't work due to the "s." It's minor, but if you could make those two consistent, it would smooth the road for future readers.