Add script syntax for cfrethrow

(I didn't add an engine value for boxlang "while I was at it", as their docs don't currently indicate support: https://boxlang.ortusbooks.com/boxlang-language/reference/components/system/rethrow)

Author: carehart

data/en/cfrethrow.json

@@ -2,6 +2,7 @@
 	"name":"cfrethrow",
 	"type":"tag",
 	"syntax":"<cfrethrow>",
+	"script":"rethrow;",
 	"related":["cftry","cfcatch","cfthrow"],
 	"description":"Rethrows the currently active exception. Preserves the\n exception's `cfcatch.type` and `cfcatch.tagContext` variable\n values.",
 	"params": [],