Build: avoid creating broken rule links in the changelog (#7731)

templates/blogpost.md.ejs

@@ -10,13 +10,13 @@ tags:
 We just pushed ESLint v<%- version %>, which is a <%- type %> release upgrade of ESLint. This release <% if (type !== "patch") { %>adds some new features and<% } %> fixes several bugs found in the previous release. <% if (type === "major") { %>This release also has some breaking changes, so please read the following closely. <% } %>
 
 <%
-const RULE_REGEX = new RegExp(ruleList.map(ruleName => `\`?${ruleName}\`?`).join("|"), "g");
+const RULE_REGEX = new RegExp(`\`?(${ruleList.join("|")})\`?`, "g");
 
 function linkify(line) {
     return line
         .replace(/#(\d+)/g, "[#$1](https://github.com/eslint/eslint/issues/$1)")
         .replace(/([a-z0-9]+)/, "[$1](https://github.com/eslint/eslint/commit/$1)")
-        .replace(RULE_REGEX, "[$&](/docs/rules/$&)");
+        .replace(RULE_REGEX, "[$&](/docs/rules/$1)");
 }
 
 function outputList(items) {