Fix comment

Co-Authored-By: Iván de Prado <ivanprado@users.noreply.github.com>

Author: jakubwasikowski

extruct/w3cmicrodata.py

@@ -36,7 +36,7 @@
     page_structure=False,  # <title> may be nice to have
     processing_instructions=True,
     embedded=False,  # keep embedded content
-    frames=False,  # keed frames
+    frames=False,  # keep frames
     forms=False,  # keep forms
     annoying_tags=False,
     remove_unknown_tags=False,