chore(deps): update dependency certifi to v2025.4.26 (#127)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [certifi](https://github.com/certifi/python-certifi) | minor | `==2025.1.31` -> `==2025.4.26` |

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### Release Notes

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

### [`v2025.4.26`](https://github.com/certifi/python-certifi/compare/2025.01.31...2025.04.26)

[Compare Source](https://github.com/certifi/python-certifi/compare/2025.01.31...2025.04.26)

</details>

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Reviewed-on: luke/epage#127
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requirements.txt

@@ -1,4 +1,4 @@
-certifi==2025.1.31
+certifi==2025.4.26
 charset-normalizer==3.4.1
 click==8.1.8
 Flask==3.1.0