Fix typo: "Extensions" (#5388)
Fix typo: "Extensions" (#5388)

Summary:
Fix minor typo in description.  Moved original PR (#5380) from master to experimental
Pull Request resolved: https://github.com/facebook/osquery/pull/5388

Differential Revision: D13781801

Pulled By: guliashvili

fbshipit-source-id: d57d5e45c1597c6d640dbf908a42ced4f4bbf54c

hackgnar/osquery,hackgnar/osquery,hackgnar/osquery