fixup - pypy test env name

Author: RonnyPfannschmidt

.github/workflows/main.yml

@@ -39,7 +39,7 @@ jobs:
             python: "3.10"
             os: windows-latest
             tox_env: "py310"
-          - name: "windows-pypy-3"
+          - name: "windows-pypy3"
             python: "pypy3.7"
             os: windows-latest
             tox_env: "py37"