Bump sphinx-issues from 4.1.0 to 5.0.0

Bumps [sphinx-issues](https://github.com/sloria/sphinx-issues) from 4.1.0 to 5.0.0.
- [Commits](sloria/sphinx-issues@4.1.0...5.0.0)

---
updated-dependencies:
- dependency-name: sphinx-issues
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -32,7 +32,7 @@ Funding = "https://opencollective.com/marshmallow"
 docs = [
   "marshmallow-sqlalchemy>=0.19.0",
   "Sphinx==8.1.0",
-  "sphinx-issues==4.1.0",
+  "sphinx-issues==5.0.0",
 ]
 tests = ["flask-marshmallow[sqlalchemy]", "pytest"]
 dev = ["flask-marshmallow[tests]", "tox", "pre-commit>=3.5,<5.0"]