Add lp dapp challenge

dapps/dapp-challenges/challenge-1-payment.mdx

@@ -229,19 +229,19 @@ For this example, we will use the Vercel cli to complete your deployment
 
 First install the Vercel cli:
 
-```sh
+```bash
 npm i global vercel
 ```
 
 Then run the following command to deploy your app:
 
-```sh
+```bash
 npx vercel
 ```
 
 Then continue through the prompts until you see the following output:
 
-```sh
+```bash
 No framework detected. Default Project Settings:
 - Build Command: 'npm run vercel-build' or 'npm run build'
 - Development Command: None
@@ -251,15 +251,15 @@ No framework detected. Default Project Settings:
 
 Select `y` to continue, and then select `build` as the output directory.
 
-```sh
+```bash
 ? Want to modify these settings? [y/N] y
 ? Which settings would you like to overwrite (select multiple)? Output Directory
 ? Output Directory? build
 ```
 
 Once the deployment is complete, you should see something similar to the following output:
 
-```sh
+```bash
 🔗  Linked to julian-dev28/soroban-react-payment (created .vercel)
 🔍  Inspect: https://vercel.com/julian-dev28/soroban-react-payment/AQoFFhZf5K1ufQj57eawApPkFduf [2s]
 ✅  Production: https://soroban-react-payment.vercel.app [58s]