f! change pytest channel to allow version 6.2.3

Author: kspieks

environment.yml

@@ -36,6 +36,7 @@ dependencies:
   - pymongo
   - pyparsing
   - rmg::pyrdl
+  - pytest
   - python >=3.7
   - pyyaml
   - rmg::quantities
@@ -58,4 +59,3 @@ dependencies:
   - conda-forge::mock
   - mjohnson541::pyrms
   - mjohnson541::julia >= 1.6
-  - anaconda::pytest