Change RuneLiteAPI#apiRoot to #sessionBase

- Rename apiRoot method to sessionBase method
- Move /session context path to sessionBase method

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

http-api/src/main/java/net/runelite/http/api/RuneLiteAPI.java

@@ -95,9 +95,9 @@ public class RuneLiteAPI
 			.build();
 	}
 
-	public static HttpUrl getApiRoot()
+	public static HttpUrl getSessionBase()
 	{
-		return HttpUrl.parse(BASE);
+		return HttpUrl.parse(BASE + "/session");
 	}
 
 	public static HttpUrl getApiBase()