lock to syntax highlight 4.1.0 because I suspect 4.2 broke something

Author: atuttle

package-lock.json

@@ -23,7 +23,7 @@
 	"dependencies": {
 		"@11ty/eleventy": "^1.0.2",
 		"@11ty/eleventy-plugin-rss": "^1.2.0",
-		"@11ty/eleventy-plugin-syntaxhighlight": "^4.2.0",
+		"@11ty/eleventy-plugin-syntaxhighlight": "4.1.0",
 		"eleventy-plugin-embed-twitter": "^1.3.4",
 		"isomorphic-fetch": "^3.0.0",
 		"luxon": "^2.4.0",