cleanup step names

.github/workflows/publish_pypi.yaml

 # Adapted from https://packaging.python.org/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/
-name: Publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+name: publish to PyPI (or TestPyPI)
 
 on:
   push:
 
 jobs:
-  build-n-publish:
-    name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+  build-and-publish:
+    name: publish to PyPI (or TestPyPI)
     runs-on: ubuntu-18.04
     strategy:
         matrix:

gym-unity/gym_unity/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.21.0.dev0"
+__version__ = "0.21.0.dev1"
-__release_tag__ = "release_8_test0"  # TODO DO NOT MERGE
+__release_tag__ = "release_8_test1"  # TODO DO NOT MERGE

ml-agents-envs/mlagents_envs/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.21.0.dev0"
+__version__ = "0.21.0.dev1"
-__release_tag__ = "release_8_test0"  # TODO DO NOT MERGE
+__release_tag__ = "release_8_test1"  # TODO DO NOT MERGE

ml-agents/mlagents/trainers/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.21.0.dev0"
+__version__ = "0.21.0.dev1"
-__release_tag__ = "release_8_test0"  # TODO DO NOT MERGE
+__release_tag__ = "release_8_test1"  # TODO DO NOT MERGE