build(deps): update dlvhdr/diffnav to v0.9.0

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [dlvhdr/diffnav](https://github.com/dlvhdr/diffnav) | minor | `v0.8.1` → `v0.9.0` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

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### Release Notes

<details>
<summary>dlvhdr/diffnav (dlvhdr/diffnav)</summary>

### [`v0.9.0`](https://github.com/dlvhdr/diffnav/releases/tag/v0.9.0)

[Compare Source](dlvhdr/diffnav@v0.8.2...v0.9.0)

#### Changelog

- [`3da3297`](dlvhdr/diffnav@3da3297) feat: floating help menu ([#&#8203;85](dlvhdr/diffnav#85))

### [`v0.8.2`](https://github.com/dlvhdr/diffnav/releases/tag/v0.8.2)

[Compare Source](dlvhdr/diffnav@v0.8.1...v0.8.2)

#### Changelog

- [`e95cea2`](dlvhdr/diffnav@e95cea2) fix: only log errors to stderr if not debug mode ([#&#8203;84](dlvhdr/diffnav#84))
- [`89fce8d`](dlvhdr/diffnav@89fce8d) fix: use cache key for side-by-side toggle instead of clearing cache ([#&#8203;77](dlvhdr/diffnav#77))

</details>

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### Configuration

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♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

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This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Author: ECG Bot

chezmoi/dot_config/aquaproj-aqua/aqua.yaml

@@ -215,7 +215,7 @@ packages:
 - name: phiresky/[email protected]
   description: "rga: ripgrep, but also search in PDFs, E-Books, Office documents, zip, tar.gz, etc"
   link: https://github.com/phiresky/ripgrep-all
-- name: dlvhdr/diffnav@v0.8.1
+- name: dlvhdr/diffnav@v0.9.0
   description: A git diff pager based on delta but with a file tree, à la GitHub
   link: https://github.com/dlvhdr/diffnav
 - name: achristmascarl/[email protected]