fix(api): get spans URL

Author: nirga

api-reference/warehouse/get_spans.mdx

@@ -1,6 +1,6 @@
 ---
 title: "Get Spans"
-api: "GET https://app.traceloop.com/api/v2/warehouse/spans"
+api: "GET https://api.traceloop.com/v2/warehouse/spans"
 ---
 
 Retrieve spans from the data warehouse with flexible filtering and pagination options. This endpoint allows you to query trace data based on various criteria including time ranges, environments, workflows, attributes, and more.