update yamato tests for 2020.1

Author: Chris Elion

.yamato/com.unity.ml-agents-test.yml

@@ -1,13 +1,17 @@
 test_editors:
   - version: 2019.4
     enableCodeCoverage: !!bool true
-    # We want some scene tests to run in the DevProject, but packages there only support 2019+
+    # We want some scene tests to run in the DevProject, but packages there only support 2020+
     testProject: Project
     enableNoDefaultPackages: !!bool true
   - version: 2020.2
     enableCodeCoverage: !!bool true
     testProject: DevProject
     enableNoDefaultPackages: !!bool true
+  - version: 2021.1
+    enableCodeCoverage: !!bool true
+    testProject: DevProject
+    enableNoDefaultPackages: !!bool true
 
 trunk_editor:
   - version: trunk

.yamato/test_versions.metafile

@@ -7,6 +7,5 @@ test_editors:
     extra_test: gym
   - version: 2020.3
     extra_test: sensor
-# TODO change to 2021.1 soon
-  - version: 2020.2
+  - version: 2021.1
     extra_test: llapi