chore(deps): update dependency certifi to v2026.2.25 (#46) [skip ci]

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [certifi](https://redirect.github.com/certifi/python-certifi) |
`==2026.1.4` → `==2026.2.25` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/certifi/2026.2.25?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/certifi/2026.1.4/2026.2.25?slim=true)
|

---

### Release Notes

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

###
[`v2026.2.25`](https://redirect.github.com/certifi/python-certifi/compare/2026.01.04...2026.02.25)

[Compare
Source](https://redirect.github.com/certifi/python-certifi/compare/2026.01.04...2026.02.25)

</details>

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requirements.txt

@@ -1,6 +1,6 @@
 babel==2.18.0
 backrefs==6.2
-certifi==2026.1.4
+certifi==2026.2.25
 charset-normalizer==3.4.4
 click==8.3.1
 colorama==0.4.6