Add https://o5.gg

Close #739
From @repacking

Author: vojkovic

searxinstances/instances.yml

@@ -12,6 +12,7 @@ https://northboot.xyz:
   additional_urls:
     http://4n53nafyi77iplnbrpmxnp3x4exbswwxigujaxy3b37fvr7bvlopxeyd.onion: Hidden Service
 https://nyc1.sx.ggtyler.dev: {}
+https://o5.gg: {}
 https://ooglester.com: {}
 https://opnxng.com: {}
 https://paulgo.io: {}