Fix issue links

Author: brianseeders

build-tools-internal/src/main/resources/templates/index.md

@@ -60,7 +60,7 @@ for (changeType in ['features-enhancements', 'fixes', 'regression']) {
         print "* ${change.summary} [#${change.pr}](https://github.com/elastic/elasticsearch/pull/${change.pr})"
         if (change.issues != null && change.issues.empty == false) {
             print change.issues.size() == 1 ? " (issue: " : " (issues: "
-            print change.issues.collect { "[#${change.pr}](https://github.com/elastic/elasticsearch/pull/${change.pr})" }.join(", ")
+            print change.issues.collect { "[#${it}](https://github.com/elastic/elasticsearch/issues/${it})" }.join(", ")
             print ")"
         }
         print "\n"