chore: formatting terminal command

src/content/docs/apis/rest-api-v2/basic-functions/api-overload-protection-handling-429-errors.mdx

@@ -129,18 +129,19 @@ Here are the HTTP headers that will appear in API responses if there is a genera
 
 Here is an example API request indicating that the caller has consumed all of the available resources, and that further API calls will be allowed again at noon on Feb. 1, 2016:
 
-```
+```sh
 curl -X GET 'https://api.newrelic.com/v2/applications.json' \
-     -H "Api-Key:<a href='/docs/apis/rest-api-v2/getting-started/introduction-new-relic-rest-api-v2#api_key'>$API_KEY</a>" -i
-HTTP/1.1 429 Too Many Requests
-Content-Type: application/json
-...
-X-RateLimit-Docs: https://docs.newrelic.com/docs/apis/rest-api-v2/requirements/api-overload-protection-preventing-429-errors
-X-RateLimit-Reset: 1454313600
-X-RateLimit-Remaining: 0
-X-RateLimit-Limit: 1000
-
-{}
+     -H "Api-Key:$API_KEY" -i
+[output] 
+[output] HTTP/1.1 429 Too Many Requests
+[output] Content-Type: application/json
+[output] ...
+[output] X-RateLimit-Docs: https://docs.newrelic.com/docs/apis/rest-api-v2/requirements/api-overload-protection-preventing-429-errors
+[output] X-RateLimit-Reset: 1454313600
+[output] X-RateLimit-Remaining: 0
+[output] X-RateLimit-Limit: 1000
+[output] 
+[output] {}
 ```
 
 ## Preventing rate limiting errors [#preventing-errors]