Fix a typo in the !#endif directive

A stray `|` turned `!#endif` into `|!#endif`. Because of this, the `!#if ext_ublock` block has no end directive. Filter compilers reject the list with "Invalid directives: Condition end not found".

Dandelion Sprout's Anti-Malware List.txt

@@ -14581,6 +14581,6 @@ $all,ipaddress=199.168.185.4
 ||youtuba.com^$all
 ||youutube.com^$all
 ||youvetube.com^$all
-|!#endif
+!#endif
 
 ! Placeholder line for alternate list versions