fix version redirects (#1104)

Author: rachel-mack

config/redirects

@@ -1,6 +1,6 @@
 define: prefix docs/drivers/node
 define: base https://www.mongodb.com/${prefix}
-define: versions v3.6 v3.7 v4.0 v4.1 v4.2 v4.3 v4.4 v4.5 v4.6 v4.7 v4.8 v4.9 v4.10 v4.11 v4.12 v4.13 v4.14 v4.15 v4.16 v4.17 v5.0 v5.1 v5.2 v5.3 v5.4 v5.5 v5.6 v5.7 v5.8 v5.9 v6.0 v6.1 v6.2 v6.3 v6.4 v6.5 v6.6 v6.7 v6.8 v6.9 v6.10 v6.11 v6.12 6.13 6.14 6.15 master
+define: versions v3.6 v3.7 v4.0 v4.1 v4.2 v4.3 v4.4 v4.5 v4.6 v4.7 v4.8 v4.9 v4.10 v4.11 v4.12 v4.13 v4.14 v4.15 v4.16 v4.17 v5.0 v5.1 v5.2 v5.3 v5.4 v5.5 v5.6 v5.7 v5.8 v5.9 v6.0 v6.1 v6.2 v6.3 v6.4 v6.5 v6.6 v6.7 v6.8 v6.9 v6.10 v6.11 v6.12 v6.13 v6.14 v6.15 master
 
 symlink: current -> master