CI/DOC: temporary pin environment to python 3.8 (#41092)

jorisvandenbossche · web-flow · commit fd67546153ac · 2021-04-22T12:00:17.000+01:00
diff --git a/environment.yml b/environment.yml
@@ -4,7 +4,7 @@ channels:
 dependencies:
   # required
   - numpy>=1.17.3
-  - python=3
+  - python=3.8
   - python-dateutil>=2.7.3
   - pytz
 
