Fix issue with remove youtube videos from NovyDenikNewsfilters

If youtube video was embeded in newsfilter, it was removed with all text
until following `<a>` element. Regexp was too greedy.

Using same fix that helped with anchors remp/remp@4499f572ecfd1df990602c6fff1112f5a38062b0

remp/helpdesk#3096

Mailer/app/Models/Generators/NovydenikNewsfilterGenerator.php

@@ -82,7 +82,7 @@ public function process(array $values): array
                 $meta = $this->content->fetchUrlMeta($url);
                 return '<a href="' . $url . '" style="padding:0;margin:0;line-height:1.3;color:#F26755;text-decoration:none;">' . $meta->getTitle() . '</a>';
             },
-            '/<a.*?href="(.*?)".*?>(.*?)<\/a>/is' => '<a href="$1" style="padding:0;margin:0;line-height:1.3;color:#b00c28;text-decoration:none;">$2</a>',
+            '/<a\s[^>]*href="(.*?)".*?>(.*?)<\/a>/is' => '<a href="$1" style="padding:0;margin:0;line-height:1.3;color:#b00c28;text-decoration:none;">$2</a>',
             '/<p.*?>(.*?)<\/p>/is' => "<p style=\"font-weight: normal;\">$1</p>",
         ];
         $rules = $this->getRules($generatorRules);