chore(deps): update pre-commit hook pre-commit/mirrors-mypy to v1.20.1 (#435)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[pre-commit/mirrors-mypy](https://redirect.github.com/pre-commit/mirrors-mypy)
| repository | patch | `v1.20.0` → `v1.20.1` |

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---

### Release Notes

<details>
<summary>pre-commit/mirrors-mypy (pre-commit/mirrors-mypy)</summary>

###
[`v1.20.1`](https://redirect.github.com/pre-commit/mirrors-mypy/compare/v1.20.0...v1.20.1)

[Compare
Source](https://redirect.github.com/pre-commit/mirrors-mypy/compare/v1.20.0...v1.20.1)

</details>

---

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---

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Author: canonical-iam

.pre-commit-config.yaml

@@ -27,7 +27,7 @@ repos:
       args: [--fix, --exit-non-zero-on-fix]
     - id: ruff-format
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.20.0
+  rev: v1.20.1
   hooks:
     - id: mypy
       args: ["--config-file", "pyproject.toml"]