updated contract deployment steps based on avax testing

Author: dev-dist

src/content/quickstarts/transmitter.mdx

@@ -106,20 +106,20 @@ First, deploy a `DataStreamsFeed.sol` contract. This contract receives and store
 
     ```bash
     cat >.env <<EOF
-    PRIVATE_KEY=0xYOUR_PRIVATE_KEY
-    RPC_URL_AVAX_FUJI=https://api.avax-test.network/ext/bc/C/rpc
+    PRIVATE_KEY=<0xYOUR_PRIVATE_KEY>
+    RPC_URL_AVAX_FUJI=<https://...>
     EOF
     ```
 
-    Replace `0xYOUR_PRIVATE_KEY` with your actual wallet private key.
+    Replace `0xYOUR_PRIVATE_KEY` with your actual wallet private key and `<https://...>` with the [RPC URL for the Avalanche Fuji network](https://build.avax.network/docs/quick-start/networks/fuji-testnet#add-avalanche-c-chain-testnet-to-wallet).
 
 1.  Load the environment variables into your current shell session:
 
     ```bash
     source .env
     ```
 
-1.  Configure `script/DeployDataStreamsFeed.s.sol`.
+1.  Configure `script/DeployDataStreamsFeedWithRoleAssign.s.sol` (or `script/DeployDataStreamsFeed.s.sol`, if you prefer to use the Deploy Only contract below).
 
     This script deploys the `DataStreamsFeed` contract, which is the consumer contract that will receive data from the Transmitter. You need to set the constructor arguments for the contract.