Mention more android/ios RIDs in rid-catalog.md (#43812)

A couple customers got confused about "missing" RIDs for ios/android. While the full list is available in the linked PortableRuntimeIdentifierGraph.json let's mention the most important ones to prevent confusion.

Author: akoeplinger

docs/core/rid-catalog.md

@@ -132,10 +132,15 @@ For more information, see [.NET dependencies and requirements](./install/macos.m
 ### iOS RIDs
 
 - `ios-arm64`
+- `iossimulator-arm64`
+- `iossimulator-x64`
 
 ### Android RIDs
 
 - `android-arm64`
+- `android-arm`
+- `android-x64`
+- `android-x86`
 
 ## See also