fix(deps): update dependency certifi to v2025.6.15 (#346)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [certifi](https://github.com/certifi/python-certifi) | project.dependencies | minor | `==2025.4.26` -> `==2025.6.15` |

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### Release Notes

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

### [`v2025.6.15`](https://github.com/certifi/python-certifi/compare/2025.04.26...2025.06.15)

[Compare Source](https://github.com/certifi/python-certifi/compare/2025.04.26...2025.06.15)

</details>

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Reviewed-on: #346
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pyproject.toml

@@ -10,7 +10,7 @@ requires-python = "<4.0,>=3.11"
 dependencies = [
     "astroid==3.3.10",
     "attrs==25.3.0",
-    "certifi==2025.4.26",
+    "certifi==2025.6.15",
     "charset-normalizer==3.4.2",
     "click==8.2.1",
     "dill==0.4.0",