add --network testnet argument to commands

Author: eyusufatik

docs/run-testnet.md

@@ -117,7 +117,7 @@ Finally run this command to run your Citrea full node:
 
 Mac:
 ```sh
-RISC0_DEV_MODE=1 ./citrea-v0.6.0-osx-arm64 --da-layer bitcoin --rollup-config-path ./rollup_config.toml --genesis-paths ./genesis
+RISC0_DEV_MODE=1 ./citrea-v0.6.0-osx-arm64 --network testnet --da-layer bitcoin --rollup-config-path ./rollup_config.toml --genesis-paths ./genesis
 ```
 
 or if you wish to use environment variables for configuring your node:
@@ -147,12 +147,12 @@ SYNC_BLOCKS_COUNT=10 \
 RUST_LOG=info \
 JSON_LOGS=1 \
 RISC0_DEV_MODE=1  \
-./citrea-v0.6.0-osx-arm64 --da-layer bitcoin --genesis-paths ./genesis
+./citrea-v0.6.0-osx-arm64 --network testnet --da-layer bitcoin --genesis-paths ./genesis
 ```
 
 Linux:
 ```sh
-RISC0_DEV_MODE=1 ./citrea-v0.6.0-linux-amd64 --da-layer bitcoin --rollup-config-path ./rollup_config.toml --genesis-paths ./genesis
+RISC0_DEV_MODE=1 ./citrea-v0.6.0-linux-amd64 --network testnet --da-layer bitcoin --rollup-config-path ./rollup_config.toml --genesis-paths ./genesis
 ```
 
 or if you wish to use environment variables for configuring your node:
@@ -183,7 +183,7 @@ SYNC_BLOCKS_COUNT=10 \
 RUST_LOG=info \
 JSON_LOGS=1 \
 RISC0_DEV_MODE=1  \
-./citrea-v0.6.0-linux-amd64 --da-layer bitcoin --genesis-paths ./genesis
+./citrea-v0.6.0-linux-amd64 --network testnet --da-layer bitcoin --genesis-paths ./genesis
 ```
 
 Your full node should be serving RPC at `http://0.0.0.0:8080` now.