realized duplicate /docs in url redirect (mongodb#75)

(cherry picked from commit 92549a3)

cherrypick

Author: shuangela

config/redirects

@@ -1,5 +1,5 @@
 define: prefix docs/languages/kotlin/kotlin-sync-driver
-define: base https://www.mongodb.com/docs/${prefix}
+define: base https://www.mongodb.com/${prefix}
 define: versions v5.1 master
 
 # raw: <source file> -> ${base}/<destination>