update UPGRADING.md

UPGRADING.md

@@ -8,8 +8,6 @@ This guide provides instructions for upgrading to specific versions of Cosmos SD
 
 Remove `Querier`, `Route` and `LegacyQuerier` from the app module interface. This removes and fully deprecates all legacy queriers. All modules no longer support the REST API previously known as the LCD, and the `sdk.Msg#Route` method won't be used anymore.
 
-
-
 ### SimApp
 
 SimApp's `app.go` is using App Wiring, the dependency injection framework of the Cosmos SDK.
@@ -26,6 +24,21 @@ The constructor, `NewSimApp` has been simplified:
 `simapp.MakeTestEncodingConfig()` was deprecated and has been removed. Instead you can use the `TestEncodingConfig` from the `types/module/testutil` package.
 This means you can replace your usage of `simapp.MakeTestEncodingConfig` in tests to `moduletestutil.MakeTestEncodingConfig`, which takes a series of relevant `AppModuleBasic` as input (the module being tested and any potential dependencies).
 
+### Client Configuration
+
+Several gas-related parameters have been added to the client config. Using SimApp as an example, the client config is recorded in the file `~/.simapp/config/client.toml`. If you have this file generated by a previous version of the Cosmos SDK, it is necessary to add the following lines:
+
+```toml
+# Gas limit to set per-transaction; set to "auto" to calculate sufficient gas automatically
+gas = "200000"
+# Adjustment factor to be multiplied against the estimate returned by the tx simulation
+gas-adjustment = "1"
+# Gas prices in decimal format to determine the transaction fee
+gas-prices = ""
+```
+
+This can be done either by re-running `simd init`, or by manually editing the file using a text editor.
+
 ## [v0.46.x](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.46.0)
 
 ### Client Changes