Update ini.rst

I'm not sure whether the verb "provide" should be conjugated to align with:

> how Python projects can ... provide "entry points"

or

> It taps into Python's ``setuptools`` library,  ... , and provides "entry points".

The glossary term for [entry point](http://docs.pylonsproject.org/projects/pyramid/en/latest/glossary.html#term-entry-point) doesn't gel for me, so I'm useless for providing any clarification.