Mention the correct brotli package

Mention the same brotli package and pypi link as it is in setup.py

README.rst

@@ -80,7 +80,7 @@ Optional Packages
 ~~~~~~~~~~~~~~~~~
 
 * `PyNaCl <https://pypi.org/project/PyNaCl/>`__ (for voice support)
-* `aiodns <https://pypi.org/project/aiodns/>`__, `Brotli <https://pypi.org/project/Brotli/>`__, `cchardet <https://pypi.org/project/cchardet/>`__ (for aiohttp speedup)
+* `aiodns <https://pypi.org/project/aiodns/>`__, `brotlipy <https://pypi.org/project/brotlipy/>`__, `cchardet <https://pypi.org/project/cchardet/>`__ (for aiohttp speedup)
 * `orjson <https://pypi.org/project/orjson/>`__ (for json speedup)
 
 Please note that while installing voice support on Linux, you must install the following packages via your preferred package manager (e.g. ``apt``, ``dnf``, etc) BEFORE running the above commands: