chore(deps): update pre-commit hook pycqa/flake8 to v7.3.0 (hetznercloud#509)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [pycqa/flake8](https://redirect.github.com/pycqa/flake8) | repository
| minor | `7.2.0` -> `7.3.0` |

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---

### Release Notes

<details>
<summary>pycqa/flake8 (pycqa/flake8)</summary>

###
[`v7.3.0`](https://redirect.github.com/pycqa/flake8/compare/7.2.0...7.3.0)

[Compare
Source](https://redirect.github.com/pycqa/flake8/compare/7.2.0...7.3.0)

</details>

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.pre-commit-config.yaml

@@ -46,6 +46,6 @@ repos:
       - id: black
 
   - repo: https://github.com/pycqa/flake8
-    rev: 7.2.0
+    rev: 7.3.0
     hooks:
       - id: flake8