Add https://searxng.mcgee.red

Close #742
From @redbeardymcgee

Author: vojkovic

searxinstances/instances.yml

@@ -99,6 +99,7 @@ https://searxng.f24o.zip:
   additional_urls:
     http://searxng.f24ozipdw2v3qudr5udqhz5sme2im4ytyufb25liyaba7zjx7ui6kxqd.onion: Hidden Service
 https://searxng.hweeren.com: {}
+https://searxng.mcgee.red: {}
 https://searxng.shreven.org: {}
 https://searxng.site: {}
 https://searxng.website: {}