.clabot: fix json, explicit recheck comment
diff --git a/.clabot b/.clabot
index 2e93d7f..606dd5f 100644
--- a/.clabot
+++ b/.clabot
@@ -3,8 +3,9 @@
 		"josharian",
 		"philz",
 		"banksean",
-		"pokey"
-		"crawshaw",
+		"pokey",
+		"crawshaw"
 	],
+	"recheckComment": "@cla-bot check",
 	"message": "We require contributors to sign our Contributor License Agreement, and we don't have you on file. In order for us to review and merge your code, please contact @crawshaw to get yourself added."
 }