Ignore Sphinx complaint about f90nml.Namelist docs

Author: maddenp-cu

docs/conf.py

@@ -21,7 +21,7 @@
 html_theme = "sphinx_rtd_theme"
 intersphinx_mapping = {"python": ("https://docs.python.org/3", None)}
 linkcheck_ignore = [r"https://github.com/.*#.*"]
-nitpick_ignore_regex = [("py:class", r"^uwtools\..*")]
+nitpick_ignore_regex = [("py:class", r"^uwtools\..*"), ("py:class", "f90nml.Namelist")]
 numfig = True
 numfig_format = {"figure": "Figure %s"}
 project = "Unified Workflow Tools"