Added 1 entry

As per https://github.com/DandelionSprout/adfilt/issues/63#issuecomment-683430537

NorwegianList.txt

@@ -1,4 +1,4 @@
-! Version: 28August2020v1
+! Version: 30August2020v1
 ! Title: 🏔️ Dandelion Sprouts nordiske filtre for ryddigere nettsider
 ! Translated title: Dandelion Sprout's Nordic filters for tidier websites
 ! Expires: 12 hours
@@ -1209,6 +1209,8 @@ oyggjatidindi.com##.bottom_space
 @@||seher.no/reise$generichide
 ! folkebladet.no; Makes job position lists show up correctly
 @@||stillingledig.*.no^
+! https://github.com/DandelionSprout/adfilt/issues/63#issuecomment-683430537
+@@.isdownorblocked.com^$doc
 ! ——— Caused by «EasyPrivacy» ———
 ! Attempting to fix a problem with voting online on Idol Norway
 @@||tv2.no/*/config/analytics.json$xhr,1p