Merge pull request #3732 from arielshmilli/master

Update documentation requirements path in environment.yml

Author: jessica-mitchell

environment.yml

@@ -58,7 +58,7 @@ dependencies:
     - -r requirements_testing.txt
 
     # To build NEST documentation
-    - -r requirements_docs.txt
+    - -r doc/requirements.txt
 
     # To run NEST Server
     - -r requirements_nest_server.txt