docs: mako -> Mako

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6915>
diff --git a/docs/meson.rst b/docs/meson.rst
index 11264f4..9f50351 100644
--- a/docs/meson.rst
+++ b/docs/meson.rst
@@ -50,7 +50,7 @@
 
 You will need to install Python 3 and Meson as a module using pip. This
 is because we use Python for generating code, and rely on external
-modules (mako). You also need pkg-config (a hard dependency of Meson),
+modules (Mako). You also need pkg-config (a hard dependency of Meson),
 Flex, and Bison. The easiest way to install everything you need is with
 `chocolatey <https://chocolatey.org/>`__.