add back old ref based on rea's feedback

Author: shuangela

config/redirects

@@ -8,7 +8,7 @@ symlink: current -> v1.20
 # general redirects
 [v1.17-v1.19]: ${prefix}/${version}/tutorial/client-side-encryption/ -> ${base}/${version}/tutorial/encryption/
 [v1.16]: ${prefix}/${version}/tutorial/encryption/ -> ${base}/${version}/
-[v1.20-*]: ${prefix}/${version}/get-started/connect-to-mongodb -> ${base}/get-started/run-sample-query
+[v1.20-*]: ${prefix}/${version}/get-started/connect-to-mongodb -> ${base}/get-started/run-sample-query/
 
 # standardization redirects
 

source/get-started/run-sample-query.txt

@@ -1,4 +1,5 @@
 .. _php-run-sample-query:
+.. _php-connect-to-mongodb:
 
 ==================
 Run a Sample Query