Update CHANGES links

Author: AA-Turner

.github/workflows/create-release.yml

@@ -87,4 +87,4 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         with:
           name: "sphinxcontrib-devhelp ${{ steps.get_version.outputs.version }}"
-          body: "Changelog: https://www.sphinx-doc.org/en/master/changes.html"
+          body: "Changelog: https://github.com/sphinx-doc/sphinxcontrib-devhelp/blob/master/CHANGES.rst"

pyproject.toml

@@ -7,11 +7,11 @@ build-backend = "flit_core.buildapi"
 name = "sphinxcontrib-devhelp"
 description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp documents"
 readme = "README.rst"
-urls.Changelog = "https://www.sphinx-doc.org/en/master/changes.html"
-urls.Code = "https://github.com/sphinx-doc/sphinxcontrib-devhelp"
+urls.Changelog = "https://github.com/sphinx-doc/sphinxcontrib-devhelp/blob/master/CHANGES.rst"
+urls.Code = "https://github.com/sphinx-doc/sphinxcontrib-devhelp/"
 urls.Download = "https://pypi.org/project/sphinxcontrib-devhelp/"
 urls.Homepage = "https://www.sphinx-doc.org/"
-urls."Issue tracker" = "https://github.com/sphinx-doc/sphinx/issues"
+urls."Issue tracker" = "https://github.com/sphinx-doc/sphinx/issues/"
 license.text = "BSD-2-Clause"
 requires-python = ">=3.9"