chore: updating doc reference to https rpc (#2937)

docs/tutorial/pre-requisites-of-running-on-chain-spam-protected-chat2.md

@@ -85,24 +85,20 @@ We include instructions for [sepolia-faucet.pk910.de](https://sepolia-faucet.pk9
 
    Follow the instructions to register and verify the account.
 
-2. Click on "Create a new API key".
+2. An API Key named "My First Key" should be auto-generated. Click on it, otherwise click on the "Create New API Key" button.
 
-    ![image](https://github.com/waku-org/nwaku/assets/68783915/3cf1d537-9f73-4a6a-b1ef-bbac148bac47)
+    ![image](imgs/infura-key.png)
 
-4. Select "Web 3 API", give your API key a descriptive name and click on "Create".
 
-    ![image](https://github.com/waku-org/nwaku/assets/68783915/f8c6c6b0-e55e-4681-8524-08303db11b9f)
+3. You will be presented with a dashboard for your new key. Make sure to have Ethereum Sepolia's checkbox selected in the Networks section.
 
-   You will be presented with a dashboard for the newly created key.
-
-    ![image](https://github.com/waku-org/nwaku/assets/68783915/54c7c2da-f512-4c48-b5bb-ff86cae021c6)
+   ![image](imgs/infura-dashboard.png)
 
-4. Select "Sepolia" in the dropdown menu for Ethereum.
-
-    ![image](https://github.com/waku-org/nwaku/assets/68783915/945bf11e-15f6-48a9-9378-f7d39f73b02c)
 
-   Both Https and WebSockets endpoints are available. Waku requires the WebSockets endpoint.
+4. Select the "Sepolia" endpoint in the Ethereum menu.
 
-    ![image](https://github.com/waku-org/nwaku/assets/68783915/adb2bac0-8f86-47d0-92cc-33d23f02aeb3)
+   ![image](imgs/infura-endpoints.png)
 
-5. Copy this address (starting with `wss://sepolia.infura`) as needed when setting up your Waku node.
+   Both Https and WebSockets endpoints are available. Waku requires the Https endpoint.
+
+5. Copy the address (starting with `https://sepolia.infura`) as needed when setting up your Waku node.