Fix typos and wording

Co-authored-by: Dustin Ingram <di@users.noreply.github.com>

Author: arshadrr

source/key_projects.rst

@@ -209,18 +209,18 @@ trove-classifiers
 
 trove-classifiers is the canonical source for `classifiers on PyPI
 <https://pypi.org/classifiers/>`_, which project maintainers use to
-`sytematically describe there projects
+`systematically describe their projects
 <https://packaging.python.org/specifications/core-metadata/#classifier-multiple-use>`_
 so that users can better find projects that match their needs on the PyPI.
 
 The trove-classifiers package contains a list of valid classifiers and
-deprecated classifiers(which are paired with the classifiers that replace
+deprecated classifiers (which are paired with the classifiers that replace
 them).  Use this package to validate classifiers used in packages intended for
-uploading to the PyPI. As this list of classifiers is published as code, you
-can script using it, providing you with a more convenient workflow compared to
+uploading to PyPI. As this list of classifiers is published as code, you
+can install and import it, giving you a more convenient workflow compared to
 referring to the `list published on PyPI <https://pypi.org/classifiers/>`_. The
 `issue tracker <https://github.com/pypa/trove-classifiers/issues>`_ for the
-project hosts discussions on classifiers such as requests for adding new
+project hosts discussions on proposed classifiers and requests for new
 classifiers.