change current symlink

Author: lindseymoore

config/redirects

@@ -2,7 +2,7 @@ define: prefix docs/drivers/go
 define: base https://www.mongodb.com/${prefix}
 define: versions v1.7 v1.8 v1.9 v1.10 v1.11 v1.12 v1.13 v1.14 v1.15 v1.16 v1.17 v2.0 v2.1 master
 
-symlink: current -> master
+symlink: current -> v2.1
 symlink: upcoming -> master
 
 raw: ${prefix}/ -> ${base}/current/