Update ipython requirement in the pip-all-updates group (#491)

Updates the requirements on [ipython](https://github.com/ipython/ipython) to permit the latest version.

Updates `ipython` to 8.38.0
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@rel-0.8.4...8.38.0)

---
updated-dependencies:
- dependency-name: ipython
  dependency-version: 8.38.0
  dependency-type: direct:development
  dependency-group: pip-all-updates
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Maximilian <maximilian.muschalik@gmail.com>

Author: dependabot[bot]

pyproject.toml

@@ -262,7 +262,7 @@ docs = [
     # TODO(mmschlk): remove the pin in ipython when we drop python 3.10 support and pin to
     # ipython>=9.0.0, since ipython==8.7.0 introduces a bug with parsing notebooks also discussed
     # here: https://github.com/spatialaudio/nbsphinx/issues/24
-    "ipython<8.38.0",           # for code execution in notebooks
+    "ipython<8.39.0",           # for code execution in notebooks
     "sphinx-gallery",           # gallery of examples from Python scripts
     "matplotlib",               # required for sphinx-gallery thumbnails
 ]