ci: add pypi environment and documentation URL to publish workflow

Author: firstof9

.github/workflows/publish-to-pypi.yml

@@ -9,6 +9,9 @@ jobs:
   build-and-publish:
     name: Builds and publishes releases to PyPI
     runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/python-openei
     permissions:
       contents: read
       id-token: write