Apply suggestion from @zerosnacks

Author: zerosnacks

src/pages/sdk/foundry/index.mdx

@@ -244,7 +244,7 @@ Anvil supports Tempo mode for local testing and forking Tempo networks:
 
 ```bash
 # Start anvil in Tempo mode
-anvil --tempo --evm-version t1
+anvil --tempo --hardfork t1
 
 # Fork a live Tempo network for local testing
 anvil --tempo --fork-url $TEMPO_RPC_URL