fix misleading typo in documentation

manifests/cert/incommon.pp

@@ -7,7 +7,7 @@
 
 # Syntax:
 #
-#     su_apache::cert::comodo { "<hostname>":
+#     su_apache::cert::incommon { "<hostname>":
 #         ensure      => present,
 #         keyname     => "ssl-key/<hostname>",
 #         owner       => "root",
@@ -53,7 +53,7 @@
 # $identity: If the file name in the cert_files module does NOT match $name, you can specify
 # the file name with $identity. Example:
 #
-# su_apache::cert::comodo { 'example.stanford.edu':
+# su_apache::cert::incommon { 'example.stanford.edu':
 #   identity => 'example2.stanford.edu',
 # }
 #