chore(deps): update dependency ipython to v8.4.0 (#1445)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [ipython](https://ipython.org) ([source](https://togithub.com/ipython/ipython)) | `==8.3.0` -> `==8.4.0` | [![age](https://badges.renovateapi.com/packages/pypi/ipython/8.4.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/ipython/8.4.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/ipython/8.4.0/compatibility-slim/8.3.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/ipython/8.4.0/confidence-slim/8.3.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>ipython/ipython</summary>

### [`v8.4.0`](https://togithub.com/ipython/ipython/compare/8.3.0...8.4.0)

[Compare Source](https://togithub.com/ipython/ipython/compare/8.3.0...8.4.0)

</details>

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Author: renovate-bot

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

@@ -1,4 +1,4 @@
-ipython==8.3.0
+ipython==8.4.0
 jupyter==1.0
 nbconvert==6.5.0
 papermill==2.3