fix regex

Author: bschnurr

build/templates/setup.yml

@@ -110,7 +110,8 @@ steps:
               "",
               "async function rewrite(file, registry) {",
               "  let contents = await fs.readFile(file, 'utf8');",
-              "  contents = contents.replace(/https:\\/\\/registry\\.[^.]+\\.(com|org)\\//g, registry);",
+              "  const re = new RegExp('https://registry\\\\.[^.]+\\\\.(com|org)/', 'g');",
+              "  contents = contents.replace(re, registry);",
               "  await fs.writeFile(file, contents);",
               "}",
               "",