chore(deps): bump the nuget-tests group across 1 directory with 3 updates (#2780)

Bumps the nuget-tests group with 3 updates in the / directory: [Verify.NUnit](https://github.com/VerifyTests/Verify), [System.Collections.Immutable](https://github.com/dotnet/runtime) and System.Net.Http.


Updates `Verify.NUnit` from 26.4.5 to 26.5.0
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@26.4.5...26.5.0)

Updates `System.Collections.Immutable` from 1.1.36 to 8.0.0
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/commits/v8.0.0)

Updates `System.Net.Http` from 2.0.20710.0 to 4.3.0

---
updated-dependencies:
- dependency-name: Verify.NUnit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nuget-tests
- dependency-name: System.Collections.Immutable
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget-tests
- dependency-name: System.Net.Http
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget-tests
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/Agent/UnitTests/PublicApiChangeTests/PublicApiChangeTests.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="PublicApiGenerator" Version="11.1.0" />
-    <PackageReference Include="Verify.NUnit" Version="26.4.5" />
+    <PackageReference Include="Verify.NUnit" Version="26.5.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>