chore(deps): update dependency gunicorn to v23 (GoogleCloudPlatform#1590)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [gunicorn](https://redirect.github.com/benoitc/gunicorn)
([changelog](https://docs.gunicorn.org/en/stable/news.html)) |
`==22.0.0` -> `==23.0.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/gunicorn/23.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/gunicorn/23.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/gunicorn/22.0.0/23.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/gunicorn/22.0.0/23.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the warning logs for
more information.

---

### Release Notes

<details>
<summary>benoitc/gunicorn (gunicorn)</summary>

###
[`v23.0.0`](https://redirect.github.com/benoitc/gunicorn/releases/tag/23.0.0)

[Compare
Source](https://redirect.github.com/benoitc/gunicorn/compare/22.0.0...23.0.0)

Gunicorn 23.0.0 has been released. This version improve HTTP 1.1.
support and which improve safety

You're invited to upgrade asap your own installation.

# 23.0.0 - 2024-08-10

-   minor docs fixes (:pr:`3217`, :pr:`3089`, :pr:`3167`)
-   worker_class parameter accepts a class (:pr:`3079`)
- fix deadlock if request terminated during chunked parsing (:pr:`2688`)
- permit receiving Transfer-Encodings: compress, deflate, gzip
(:pr:`3261`)
- permit Transfer-Encoding headers specifying multiple encodings. note:
no parameters, still (:pr:`3261`)
- sdist generation now explicitly excludes sphinx build folder
(:pr:`3257`)
- decode bytes-typed status (as can be passed by gevent) as utf-8
instead of raising `TypeError` (:pr:`2336`)
- raise correct Exception when encounting invalid chunked requests
(:pr:`3258`)
- the SCRIPT_NAME and PATH_INFO headers, when received from allowed
forwarders, are no longer restricted for containing an underscore
(:pr:`3192`)
- include IPv6 loopback address `[::1]` in default for
:ref:`forwarded-allow-ips` and :ref:`proxy-allow-ips` (:pr:`3192`)

\*\* NOTE \*\*

- The SCRIPT_NAME change mitigates a regression that appeared first in
the 22.0.0 release
- Review your :ref:`forwarded-allow-ips` setting if you are still not
seeing the SCRIPT_NAME transmitted
- Review your :ref:`forwarder-headers` setting if you are missing
headers after upgrading from a version prior to 22.0.0

\*\* Breaking changes \*\*

-   refuse requests where the uri field is empty (:pr:`3255`)
- refuse requests with invalid CR/LR/NUL in heade field values
(:pr:`3253`)
- remove temporary `--tolerate-dangerous-framing` switch from 22.0
(:pr:`3260`)
- If any of the breaking changes affect you, be aware that now refused
requests can post a security problem, especially so in setups involving
request pipe-lining and/or proxies.

Fix CVE-2024-1135

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "* * 1 */3 *" (UTC), Automerge - At
any time (no schedule defined).

🚦 **Automerge**: Disabled because a matching PR was automerged
previously.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/GoogleCloudPlatform/generative-ai).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS44NS4wIiwidXBkYXRlZEluVmVyIjoiMzkuODUuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Author: renovate-bot

gemini/sample-apps/gemini-mesop-cloudrun/requirements.txt

@@ -1,6 +1,6 @@
 mesop
 Flask==3.0.0
-gunicorn==22.0.0
+gunicorn==23.0.0
 Werkzeug==3.0.6
 dataclasses_json
 google-cloud-aiplatform