Add back some LTS versions of 6.x into prerender

Author: kategengler

prember-urls.js

@@ -56,7 +56,16 @@ module.exports = function () {
       addUrlToVersion(`${p}/${uniqVersion}`, `/${p}/${uniqVersion}/${suffix}`);
     };
 
-    const oldVersions = ['1.13', '2.18', '3.28', '4.12', '5.12'];
+    const oldVersions = [
+      '1.13',
+      '2.18',
+      '3.28',
+      '4.12',
+      '5.12',
+      '6.0',
+      '6.4',
+      '6.8',
+    ];
 
     uniqueProjectVersions.forEach((uniqVersion) => {
       let isPreRelease = uniqVersion.includes('-');