use any py3 for example validation, not just py38

Author: farleyb-amazon

codebuild/release/validate.yml

@@ -15,9 +15,7 @@ env:
 phases:
   install:
     commands:
-      - pyenv install 3.8.12
-      - pyenv local 3.8.12
-      - pip install tox tox-pyenv
+      - pip install tox
     runtime-versions:
       python: latest
   pre_build:
@@ -30,7 +28,7 @@ phases:
       - |
         while [ $NUM_RETRIES -gt 0 ]
         do
-          tox -re py38-examples
+          tox -re py3-examples
           if [ $? -eq 0 ]; then
             break
           fi

examples/tox.ini

@@ -2,7 +2,7 @@
 
 [tox]
 envlist =
-    py{36,37,38,39}-examples
+    py{3,36,37,38,39}-examples
 
 [testenv:base-command]
 commands = python -m pytest --basetemp={envtmpdir} -l {posargs}