Update pages/serverless-functions/reference-content/functions-limitations.mdx

Co-authored-by: Néda <[email protected]>

Author: SamyOubouaziz

pages/serverless-functions/reference-content/functions-limitations.mdx

@@ -41,7 +41,7 @@ This section contains usage limits that apply when using Serverless Functions.
 
 \** Total function memory is the sum of the memory allocated to all your functions at their maximum Scale.
 
-\*** Each instance of a function can handle a single request at a time, but a function can have several instances running in parallel.
+\*** Each instance of a function can handle a single request at a time, but a function can have several instances running at the same time.
 
 \**** Maximum duration of a single HTTP request before this request is timed out. Use [Serverless Jobs](/serverless-jobs/) for tasks up to 24h.