Bump ipython from 8.19.0 to 8.21.0

Bumps [ipython](https://github.com/ipython/ipython) from 8.19.0 to 8.21.0.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@8.19.0...8.21.0)

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

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

dev-requirements.txt

@@ -58,7 +58,7 @@ importlib-metadata==7.0.1
     # via yapf
 iniconfig==2.0.0
     # via pytest
-ipython==8.19.0
+ipython==8.21.0
     # via -r dev-requirements.in
 isort==5.13.2
     # via