Update hitbox.tv ingest servers list

Added: US-
West (San Francisco)

plugins/rtmp-services/data/services.json

@@ -146,6 +146,10 @@
                 "name": "US-Central: Denver",
                 "url": "rtmp://live.den.hitbox.tv/push"
             },
+            {
+                "name": "US-West: San Francisco",
+                "url": "rtmp://live.sfo.hitbox.tv/push"
+            },
             {
                 "name": "US-West: Los Angeles",
                 "url": "rtmp://live.lax.hitbox.tv/push"