fixup! Use immutable DateTime

Author: jtojnar

src/controllers/Rss.php

@@ -75,7 +75,7 @@ public function rss(): void {
             $newItem->setTitle($this->sanitizeTitle($item['title'] . ' (' . $lastSourceName . ')'));
             @$newItem->setLink($item['link']);
             @$newItem->setId($item['link']);
-            $newItem->setDate(DateTime::createFromImmutable($item['datetime']));
+            $newItem->setDate(\DateTime::createFromImmutable($item['datetime']));
             $newItem->setDescription(str_replace('"', '"', $item['content']));
 
             // add tags in category node
@@ -98,7 +98,7 @@ public function rss(): void {
         if ($newestEntryDate === null) {
             $newestEntryDate = new \DateTimeImmutable();
         }
-        $this->feedWriter->setDate(DateTime::createFromImmutable($newestEntryDate));
+        $this->feedWriter->setDate(\DateTime::createFromImmutable($newestEntryDate));
 
         $this->feedWriter->printFeed();
     }