build(deps): bump ipython

Bumps [ipython](https://github.com/ipython/ipython) from 7.0 to 7.16.3.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.0.0...7.16.3)

---
updated-dependencies:
- dependency-name: ipython
  dependency-type: direct:production
...

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

synthtool/gcp/templates/python_notebooks_testing_pipeline/.cloud-build/requirements.txt

@@ -1,4 +1,4 @@
-ipython==7.0
+ipython==7.16.3
 jupyter==1.0
 nbconvert==6.0
 papermill==2.3