chore: updated region list (#2867)

Author: NicholasKissel

site/src/content/docs/cloud/edge.mdx

@@ -7,13 +7,10 @@ Actors run near your users on Rivet's global network by default.
 | Region | Location                     |
 | ------ | ---------------------------- |
 | `atl`  | Atlanta, Georgia, USA        |
-| `bom`  | Mumbai, India                |
 | `fra`  | Frankfurt, Germany           |
 | `gru`  | São Paulo, Brazil            |
 | `lax`  | Los Angeles, California, USA |
-| `osa`  | Osaka, Japan                 |
 | `sin`  | Singapore                    |
-| `syd`  | Sydney, Australia            |
 
 <Tip>
 	**Don't hardcode regions.** Dynamically fetching the region list allows you to support more region & develop locally. See [Fetching region list](#fetching-region-list) for more information.