test: fix typo in test/common/index.js

PR-URL: #40297
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

test/common/index.js

@@ -272,7 +272,7 @@ let knownGlobals = [
 
 // TODO(@jasnell): This check can be temporary. AbortController is
 // not currently supported in either Node.js 12 or 10, making it
-// difficult to run tests comparitively on those versions. Once
+// difficult to run tests comparatively on those versions. Once
 // all supported versions have AbortController as a global, this
 // check can be removed and AbortController can be added to the
 // knownGlobals list above.