💚 fix the RtD doxygen run (#912)

## Description

This PR fixes the doxygen run that is performed on RtD.
This would previously fail silently because it could not create the
respective directory.
This also adds a release note to prepare for the imminent patch release.

## Checklist:

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- [x] The pull request only contains commits that are related to it.
- [x] I have added appropriate tests and documentation.
- [x] I have made sure that all CI jobs on GitHub pass.
- [x] The pull request introduces no new warnings and follows the
project's style guidelines.

---------

Signed-off-by: burgholzer <[email protected]>

Author: burgholzer

CHANGELOG.md

@@ -7,6 +7,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+## [3.0.1] - 2025-04-07
+
+_Fix PyPI project metadata as well as doxygen build on RtD._
+
 ## [3.0.0] - 2025-04-06
 
 _If you are upgrading: please see [`UPGRADING.md`](UPGRADING.md#300)._
@@ -64,6 +68,7 @@ _📚 Refer to the [GitHub Release Notes](https://github.com/munich-quantum-tool
 
 [PEP 639]: https://peps.python.org/pep-0639/
 [PEP 735]: https://peps.python.org/pep-0735/
-[unreleased]: https://github.com/munich-quantum-toolkit/core/compare/v3.0.0...HEAD
+[unreleased]: https://github.com/munich-quantum-toolkit/core/compare/v3.0.1...HEAD
+[3.0.1]: https://github.com/munich-quantum-toolkit/core/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/munich-quantum-toolkit/core/compare/v2.7.0...v3.0.0
 [2.7.0]: https://github.com/munich-quantum-toolkit/core/releases/tag/v2.7.0

docs/conf.py

@@ -171,8 +171,11 @@ def format_url(self, _e: Entry) -> HRef:  # noqa: PLR6301
 
 read_the_docs_build = os.environ.get("READTHEDOCS", None) == "True"
 if read_the_docs_build:
-    subprocess.call("doxygen", shell=True)  # noqa: S602, S607
-    subprocess.call("mkdir api/cpp & breathe-apidoc -o api/cpp -m -f -T _build/doxygen/xml/", shell=True)  # noqa: S602, S607
+    subprocess.call("mkdir -p _build/doxygen && doxygen", shell=True)  # noqa: S602, S607
+    subprocess.call(  # noqa: S602
+        "mkdir -p api/cpp && breathe-apidoc -o api/cpp -m -f -g namespace _build/doxygen/xml/",  # noqa: S607
+        shell=True,
+    )
 
 # -- Options for HTML output -------------------------------------------------
 html_theme = "furo"