chore(deps): update dependency tunit to 1.7.7 (#4253)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [TUnit](https://redirect.github.com/thomhurst/TUnit) | `1.7.5` →
`1.7.7` |
![age](https://developer.mend.io/api/mc/badges/age/nuget/TUnit/1.7.7?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/TUnit/1.7.5/1.7.7?slim=true)
|

---

### Release Notes

<details>
<summary>thomhurst/TUnit (TUnit)</summary>

###
[`v1.7.7`](https://redirect.github.com/thomhurst/TUnit/releases/tag/v1.7.7):
1.7.7

<!-- Release notes generated using configuration in .github/release.yml
at v1.7.7 -->

##### What's Changed

##### Other Changes

- feat: implement dynamic attribute merging for test data collectors an…
by [@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4188](https://redirect.github.com/thomhurst/TUnit/pull/4188)

##### Dependencies

- chore(deps): update tunit to 1.7.0 by
[@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4180](https://redirect.github.com/thomhurst/TUnit/pull/4180)

**Full Changelog**:
<thomhurst/TUnit@v1.7.5...v1.7.7>

</details>

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src/Directory.Packages.props

@@ -46,7 +46,7 @@
     <PackageVersion Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
     <PackageVersion Include="System.Runtime.Serialization.Primitives" Version="4.3.0" />
     <PackageVersion Include="System.Text.Json" Version="10.0.1" />
-    <PackageVersion Include="TUnit" Version="1.7.5" />
+    <PackageVersion Include="TUnit" Version="1.7.7" />
     <PackageVersion Include="Verify.TUnit" Version="31.9.3" />
     <PackageVersion Include="Microsoft.Windows.CsWinRT" Version="2.3.0-prerelease.251115.2" />
     <PackageVersion Include="Microsoft.AspNetCore.Components" Version="$(AspNetVersion)" />