fix(lookup): improve digest comparison

lib/workers/repository/process/lookup/index.js

@@ -235,8 +235,7 @@ async function lookupUpdates(config) {
     .filter(
       update =>
         update.newValue !== config.currentValue ||
-        (update.newDigest !== config.currentDigest &&
-          update.newDigestShort !== config.currentDigest)
+        (update.newDigest && !update.newDigest.startsWith(config.currentDigest))
     );
   if (res.updates.some(update => update.updateType === 'pin')) {
     for (const update of res.updates) {