fix url of environment to testpypi

.github/workflows/python-publish-test.yml

@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     environment:
       name: testpypi
-      url: https://pypi.org/p/kegg-pathways-completeness
+      url: https://test.pypi.org/p/kegg-pathways-completeness
     permissions:
       id-token: write # IMPORTANT: mandatory for trusted publishing