Ignore common/ from codespell

Author: yarikoptic

setup.cfg

@@ -47,7 +47,7 @@ readthedocs/__init__.py =
 
 [codespell]
 # Ref: https://github.com/codespell-project/codespell#using-a-config-file
-skip = .git,*.svg,locale,package-lock.json,*.css,*.min.*,vendor,*.ai,setup.cfg,migrations,CHANGELOG.rst
+skip = .git,*.svg,locale,package-lock.json,*.css,*.min.*,vendor,*.ai,setup.cfg,migrations,CHANGELOG.rst,common
 check-hidden = true
 # some names and abbreviations and very long lines (minimized?)
 # TODO: fixup help_text in readthedocs/builds/models.py : "to perfom an"