chore(deps): update dependency backrefs to v6.2 (#24)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [backrefs](https://redirect.github.com/facelessuser/backrefs) |
`==6.1` → `==6.2` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/backrefs/6.2?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/backrefs/6.1/6.2?slim=true)
|

---

### Release Notes

<details>
<summary>facelessuser/backrefs (backrefs)</summary>

###
[`v6.2`](https://redirect.github.com/facelessuser/backrefs/releases/tag/6.2)

[Compare
Source](https://redirect.github.com/facelessuser/backrefs/compare/6.1...6.2)

#### 6.2

- **NEW** Add alias `prefixmatch` for `match` in both `bre` and
`bregex`.

</details>

---

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requirements.txt

@@ -1,5 +1,5 @@
 babel==2.18.0
-backrefs==6.1
+backrefs==6.2
 certifi==2026.1.4
 charset-normalizer==3.4.4
 click==8.3.1