ci: Ignore https://taskinoz.com/northstar/ for linkcheck

The site seems to either take too long to respond or falsely detect us as spam so easiest is to just skip it during linkcheck

.github/.markdownlinkcheck.json

@@ -9,6 +9,9 @@
         {
             "pattern": "https://forum.manjaro.org/t/howto-troubleshoot-crackling-in-pipewire/82442"
         },
+        {
+            "pattern": "https://taskinoz.com/northstar/"
+        },
         {
             "pattern": "https://wiki.archlinux.org/title/PulseAudio/Troubleshooting#Glitches.2C\\_skips\\_or\\_crackling"
         }