fix(deps): update dependency certifi to v2025.7.9 (#351)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [certifi](https://github.com/certifi/python-certifi) | `==2025.6.15` -> `==2025.7.9` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/certifi/2025.7.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/certifi/2025.6.15/2025.7.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>certifi/python-certifi (certifi)</summary>

### [`v2025.7.9`](https://github.com/certifi/python-certifi/compare/2025.06.15...2025.07.09)

[Compare Source](https://github.com/certifi/python-certifi/compare/2025.06.15...2025.07.09)

</details>

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Reviewed-on: #351
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Co-committed-by: Renovate [BOT] <renovate-bot@git.tainton.uk>

pyproject.toml

@@ -10,7 +10,7 @@ requires-python = "<4.0,>=3.11"
 dependencies = [
     "astroid==3.3.10",
     "attrs==25.3.0",
-    "certifi==2025.6.15",
+    "certifi==2025.7.9",
     "charset-normalizer==3.4.2",
     "click==8.2.1",
     "dill==0.4.0",