test - fix pypy versions?

Author: RonnyPfannschmidt

.github/workflows/main.yml

@@ -42,7 +42,7 @@ jobs:
           - name: "windows-pypy3"
             python: "pypy3"
             os: windows-latest
-            tox_env: "pypy3"
+            tox_env: "pypy3.7"
           - name: "ubuntu-py37-pytestmain"
             python: "3.7"
             os: ubuntu-latest
@@ -69,7 +69,7 @@ jobs:
             tox_env: "py310"
             use_coverage: true
           - name: "ubuntu-pypy3"
-            python: "pypy3"
+            python: "pypy3.7"
             os: ubuntu-latest
             tox_env: "pypy3"
             use_coverage: true