Update the EU endpoint for server-side sources (#3651)

Author: markzegarelli

src/guides/regional-segment.md

@@ -45,7 +45,7 @@ All Segment client-side SDKs read this setting and update themselves automatical
 ### Server-side and project sources
 When you send data from a server-side or project source, you can use the `host` configuration parameter to send data to the desired region:
 1. Oregon (Default) — `api.segment.io/v1`
-2. Dublin — `events.eu1.segmentapis.com/v1/`
+2. Dublin — `events.eu1.segmentapis.com/`
 
 ## Create a new workspace with a different region