Update dependency mike to v2.1.3 (#379)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [mike](https://togithub.com/jimporter/mike) | `2.1.2` -> `2.1.3` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/mike/2.1.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/mike/2.1.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/mike/2.1.2/2.1.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mike/2.1.2/2.1.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>jimporter/mike (mike)</summary>

###
[`v2.1.3`](https://togithub.com/jimporter/mike/blob/HEAD/CHANGES.md#v213-2024-08-12)

[Compare
Source](https://togithub.com/jimporter/mike/compare/v2.1.2...v2.1.3)

##### Bug fixes

- When deploying using a deploy prefix, only delete stale versions of
the docs
    within that prefix

***

</details>

---

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