Fix nose documentation

Follow-up to pytest-dev#8048 which seems to have been merged without the suggested changes.

Author: The-Compiler

doc/en/nose.rst

@@ -68,11 +68,11 @@ Unsupported idioms / known issues
   fundamentally incompatible with pytest because they don't support fixtures
   properly since collection and test execution are separated.
 
-Migrating from Nose to Pytest
+Migrating from nose to pytest
 ------------------------------
 
 `nose2pytest <https://github.com/pytest-dev/nose2pytest>`_ is a Python script
-and py.test plugin to help convert Nose-based tests into py.test-based tests.
+and pytest plugin to help convert Nose-based tests into pytest-based tests.
 Specifically, the script transforms nose.tools.assert_* function calls into
 raw assert statements, while preserving format of original arguments
 as much as possible.