fix(automerge): don’t exit early if automerging pr comment (#4105)

Closes #4052

lib/workers/repository/process/write.js

@@ -32,7 +32,7 @@ async function writeUpdates(config, packageFiles, allBranches) {
     );
     branch.res = res;
     // @ts-ignore
-    if (res === 'pr-closed' || res === 'automerged') {
+    if (res === 'automerged' && config.automergeType !== 'pr-comment') {
       // Stop procesing other branches because base branch has been changed
       return res;
     }