chore(deps): update dependency tunit to 1.7.20 (#4254)

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) | `1.7.7` →
`1.7.20` |
![age](https://developer.mend.io/api/mc/badges/age/nuget/TUnit/1.7.20?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/TUnit/1.7.7/1.7.20?slim=true)
|

---

### Release Notes

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

###
[`v1.7.20`](https://redirect.github.com/thomhurst/TUnit/releases/tag/v1.7.20):
1.7.20

<!-- Release notes generated using configuration in .github/release.yml
at v1.7.20 -->

#### What's Changed

##### Other Changes

- feat: properly migrate NUnit TestCase properties to TUnit attributes
by [@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4209](https://redirect.github.com/thomhurst/TUnit/pull/4209)

##### Dependencies

- chore(deps): update dependency testcontainers.postgresql to 4.10.0 by
[@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4205](https://redirect.github.com/thomhurst/TUnit/pull/4205)
- chore(deps): update tunit to 1.7.16 by
[@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4206](https://redirect.github.com/thomhurst/TUnit/pull/4206)

**Full Changelog**:
<thomhurst/TUnit@v1.7.16...v1.7.20>

###
[`v1.7.16`](https://redirect.github.com/thomhurst/TUnit/releases/tag/v1.7.16):
1.7.16

<!-- Release notes generated using configuration in .github/release.yml
at v1.7.16 -->

#### What's Changed

##### Other Changes

- feat: comprehensive migration code fixer improvements by
[@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4202](https://redirect.github.com/thomhurst/TUnit/pull/4202)
- Add telemetry package by
[@&#8203;Youssef1313](https://redirect.github.com/Youssef1313) in
[#&#8203;4200](https://redirect.github.com/thomhurst/TUnit/pull/4200)
- feat: add System.Threading.Tasks using and preserve TestCase
properties by [@&#8203;thomhurst](https://redirect.github.com/thomhurst)
in [#&#8203;4203](https://redirect.github.com/thomhurst/TUnit/pull/4203)

##### Dependencies

- chore(deps): update tunit to 1.7.7 by
[@&#8203;thomhurst](https://redirect.github.com/thomhurst) in
[#&#8203;4189](https://redirect.github.com/thomhurst/TUnit/pull/4189)

**Full Changelog**:
<thomhurst/TUnit@v1.7.7...v1.7.16>

</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="1.7.7" />
+    <PackageVersion Include="TUnit" Version="1.7.20" />
     <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)" />