deps: update dependency idna to v3.8 (#3156)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [idna](https://redirect.github.com/kjd/idna)
([changelog](https://redirect.github.com/kjd/idna/blob/master/HISTORY.rst))
| `==3.7` -> `==3.8` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/idna/3.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/idna/3.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/idna/3.7/3.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/idna/3.7/3.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

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

---

### Release Notes

<details>
<summary>kjd/idna (idna)</summary>

### [`v3.8`](https://redirect.github.com/kjd/idna/releases/tag/v3.8)

[Compare
Source](https://redirect.github.com/kjd/idna/compare/v3.7...v3.8)

#### What's Changed

- Fix regression where IDNAError exception was not being produced for
certain inputs.
- Add support for Python 3.13, drop support for Python 3.5 as it is no
longer testable.
-   Documentation improvements
-   Updates to package testing using Github actions

Thanks to Hugo van Kemenade for contributions to this release.

**Full Changelog**: kjd/idna@v3.7...v3.8

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **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/googleapis/sdk-platform-java).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC41OS4yIiwidXBkYXRlZEluVmVyIjoiMzguNTkuMiIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

library_generation/requirements.txt

@@ -170,9 +170,9 @@ gitpython==3.1.43 \
     --hash=sha256:35f314a9f878467f5453cc1fee295c3e18e52f1b99f10f6cf5b1682e968a9e7c \
     --hash=sha256:eec7ec56b92aad751f9912a73404bc02ba212a23adb2c7098ee668417051a1ff
     # via -r requirements.in
-idna==3.7 \
-    --hash=sha256:028ff3aadf0609c1fd278d8ea3089299412a7a8b9bd005dd08b9f8285bcb5cfc \
-    --hash=sha256:82fee1fc78add43492d3a1898bfa6d8a904cc97d8427f683ed8e798d07761aa0
+idna==3.8 \
+    --hash=sha256:050b4e5baadcd44d760cedbd2b8e639f2ff89bbc7a5730fcc662954303377aac \
+    --hash=sha256:d838c2c0ed6fced7693d5e8ab8e734d5f8fda53a039c0164afb0b82e771e3603
     # via requests
 jinja2==3.1.4 \
     --hash=sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369 \