scripts/sphinx-pre-install: fix "dependenties" typo

Fix typo ("dependenties" for "dependencies").

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index f001fc2..158f522 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -632,7 +632,7 @@
 	}
 	printf "\n";
 
-	print "All optional dependenties are met.\n" if (!$optional);
+	print "All optional dependencies are met.\n" if (!$optional);
 
 	if ($need == 1) {
 		die "Can't build as $need mandatory dependency is missing";