fix regex pattern

Author: hatemhosny

src/livecodes/services/modules.ts

@@ -122,7 +122,7 @@ const TEMPLATES: Array<[RegExp, string]> = [
 
   [/^(pr:)(.+)/i, 'https://esm.sh/pr/$2'],
 
-  [/^(pkg.pr.new:)(.+)/i, 'https://esm.sh/pkg.pr.new/$2'],
+  [/^(pkg\.pr\.new:)(.+)/i, 'https://esm.sh/pkg.pr.new/$2'],
 
   [/^(skypack:)(.+)/i, 'https://cdn.skypack.dev/$2'],