Add comments to Tox environments that aren't run in CI

Author: benjaoming

tox.ini

@@ -29,6 +29,7 @@ allowlist_externals =
     sh
     git
 
+# This is NOT run in CI builds, it can be used locally for convenience
 [testenv:docs]
 description = Build readthedocs user documentation
 changedir = {toxinidir}/docs
@@ -39,6 +40,7 @@ setenv =
 commands =
     sphinx-build -W --keep-going -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
 
+# This is NOT run in CI builds, it can be used locally for convenience
 [testenv:docs-dev]
 description = Build readthedocs developer documentation
 changedir = {toxinidir}/docs