chore: fix code in docs

Author: yordis

guides/explanations/2.middleware.md

@@ -84,15 +84,15 @@ defmodule MyApp.ServiceName do
       # Use string keys for untrusted input
       Tesla.Middleware.JSON,
       # Compress the request and response
-      #Tesla.Middleware.Compression,
+      # Tesla.Middleware.Compression,
 
       # ------------------------------------------------------------------------
       # Keep the telemetry and logging as close as possible to the actual request
       # being made.
       # Log requests and responses
       Tesla.Middleware.Logger,
       # Telemetry for timing
-      {Tesla.Middleware.Telemetry},
+      Tesla.Middleware.Telemetry,
       # Optional OpenTelemetry middleware
       # Tesla.Middleware.OpenTelemetry
     ]