Update module go:github.com/grafana/oats to v0.4.0 (#1466)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [go:github.com/grafana/oats](https://redirect.github.com/grafana/oats)
| `0.3.2` -> `0.4.0` |
[![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fgrafana%2foats/v0.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fgrafana%2foats/v0.3.2/v0.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>grafana/oats (go:github.com/grafana/oats)</summary>

###
[`v0.4.0`](https://redirect.github.com/grafana/oats/releases/tag/v0.4.0)

[Compare
Source](https://redirect.github.com/grafana/oats/compare/v0.3.2...v0.4.0)

#### What's Changed

- Support .`yml` files for test cases by
[@&#8203;martincostello](https://redirect.github.com/martincostello) in
[https://github.com/grafana/oats/pull/133](https://redirect.github.com/grafana/oats/pull/133)
- Support non-GET requests by
[@&#8203;martincostello](https://redirect.github.com/martincostello) in
[https://github.com/grafana/oats/pull/134](https://redirect.github.com/grafana/oats/pull/134)

#### New Contributors

- [@&#8203;martincostello](https://redirect.github.com/martincostello)
made their first contribution in
[https://github.com/grafana/oats/pull/133](https://redirect.github.com/grafana/oats/pull/133)

**Full Changelog**:
grafana/oats@v0.3.2...v0.4.0

</details>

---

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mise.toml

@@ -1,7 +1,7 @@
 [tools]
 "cargo:zizmor" = "1.9.0"
 "go:github.com/gohugoio/hugo" = "v0.148.1"
-"go:github.com/grafana/oats" = "0.3.2"
+"go:github.com/grafana/oats" = "0.4.0"
 java = "temurin-21.0.8+9.0.LTS"
 lychee = "0.19.1"
 protoc = "31.1"