Bump the all group in /dependabot with 2 updates

Bumps the all group in /dependabot with 2 updates: [pytz](https://github.com/stub42/pytz) and [ipython](https://github.com/ipython/ipython).


Updates `pytz` from 2025.2 to 2026.1.post1
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2025.2...release_2026.1.post1)

Updates `ipython` from 9.10.0 to 9.11.0
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@9.10.0...9.11.0)

---
updated-dependencies:
- dependency-name: pytz
  dependency-version: 2026.1.post1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: ipython
  dependency-version: 9.11.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all
...

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

Author: dependabot[bot]

dependabot/requirements.txt

@@ -72,7 +72,7 @@ multipart==1.3.1
 persistent==6.5
 pycparser==3.0
 python-gettext==5.0
-pytz==2025.2
+pytz==2026.1.post1
 transaction==5.0
 zc.lockfile==4.0
 zodbpickle==4.3
@@ -102,7 +102,7 @@ grokcore.startup==5.0
 grokcore.traverser==5.0
 grokcore.view==5.0
 grokcore.viewlet==5.1
-ipython==9.10.0
+ipython==9.11.0
 martian==2.1
 z3c.evalexception==4.0
 z3c.flashmessage==4.0