Fix JS snippets trailing commas. (#104153)

Fix JS snippets trailing commas, introduced by #100657 and observed by #104141.

extensions/javascript/snippets/javascript.code-snippets

@@ -180,14 +180,14 @@
 	"Log warning to console": {
 		"prefix": "warn",
 		"body": [
-			"console.warn($1);",
+			"console.warn($1);"
 		],
 		"description": "Log warning to the console"
 	},
 	"Log error to console": {
 		"prefix": "error",
 		"body": [
-			"console.error($1);",
+			"console.error($1);"
 		],
 		"description": "Log error to the console"
 	}