doc: fix doc typo in py_wheel.bzl (#1899)

Fix typo in the py_wheel.bzl docs.

python/private/py_wheel.bzl

diff --git a/python/private/py_wheel.bzl b/python/private/py_wheel.bzl
index 2aed9b9..ef9e6f2 100644
--- a/python/private/py_wheel.bzl
+++ b/python/private/py_wheel.bzl
@@ -39,7 +39,7 @@
         doc = """\
 Name of the distribution.
 
-This should match the project name onm PyPI. It's also the name that is used to
+This should match the project name on PyPI. It's also the name that is used to
 refer to the package in other packages' dependencies.
 
 Workspace status keys are expanded using `{NAME}` format, for example: