Fix wording in README

Co-authored-by: Danny <Rapptz@users.noreply.github.com>

README.rst

@@ -60,7 +60,7 @@ Optional Packages
 
 * `PyNaCl <https://pypi.org/project/PyNaCl/>`__ (for voice support)
 
-Please note that on Linux installing voice you must install the following packages via your favourite package manager (e.g. ``apt``, ``dnf``, etc) before running the above commands:
+Please note that when installing voice support on Linux, you must install the following packages via your favourite package manager (e.g. ``apt``, ``dnf``, etc) before running the above commands:
 
 * libffi-dev (or ``libffi-devel`` on some systems)
 * python-dev (e.g. ``python3.6-dev`` for Python 3.6)