fixed typo: --dry-dun -> dry-run
@@ -38,7 +38,7 @@ We also check that static files can be collected:
However, this check does not cover all the cases.
Sometimes ``ManifestStaticFilesStorage`` will fail on real cases,
-but will pass with ``--dry-dun`` option.
+but will pass with ``--dry-run`` option.
You can disable ``--dry-run`` option if you know what you are doing.
Be careful with this option, when working with auto-uploading
your static files to any kind of CDNs.
