Bump ipython from 8.14.0 to 8.18.1

Bumps [ipython](https://github.com/ipython/ipython) from 8.14.0 to 8.18.1.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@8.14.0...8.18.1)

---
updated-dependencies:
- dependency-name: ipython
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

doc/requirements.txt

@@ -3,7 +3,7 @@ entrypoints==0.4
 Pillow==10.0.0
 Sphinx==7.2.2
 furo==2023.8.17
-ipython==8.14.0
+ipython==8.18.1
 netCDF4==1.6.4
 xarray==2023.7.0
 matplotlib==3.7.2