Ignore pytest-xdist's depracation warning

It is coming from `pytest-cov`'s usage of the deprecated `rsyncdir`
setting use.

This patch can be reverted once
pytest-dev/pytest-cov#558 is in and released.

Ref: pytest-dev/pytest-cov#557

pytest.ini

@@ -53,6 +53,10 @@ filterwarnings =
   # `cgi` is deprecated via https://peps.python.org/pep-0594/#cgi
   ignore:'cgi' is deprecated and slated for removal in Python 3.13:DeprecationWarning:
 
+  # FIXME: drop this once `pytest-cov` is updated.
+  # Ref: https://github.com/pytest-dev/pytest-cov/issues/557
+  ignore:The --rsyncdir command line argument and rsyncdirs config variable are deprecated.:DeprecationWarning
+
 # https://docs.pytest.org/en/stable/usage.html#creating-junitxml-format-files
 junit_duration_report = call
 # xunit1 contains more metadata than xunit2 so it's better for CI UIs: