Bump Microsoft.NET.Test.Sdk and 2 others (#396)

Bumps Microsoft.NET.Test.Sdk from 17.13.0 to 17.14.1
Bumps System.Collections.Immutable from 8.0.0 to 9.0.6
Bumps xunit.runner.visualstudio from 3.0.2 to 3.1.1

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 17.14.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: System.Collections.Immutable
  dependency-version: 9.0.6
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: xunit.runner.visualstudio
  dependency-version: 3.1.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

dotnet/src/StackExchange.StacksIcons.csproj

@@ -41,6 +41,6 @@
 
 	<ItemGroup>
 		<FrameworkReference Include="Microsoft.AspNetCore.App" />
-		<PackageReference Include="System.Collections.Immutable" Version="8.0.0" />
+		<PackageReference Include="System.Collections.Immutable" Version="9.0.6" />
 	</ItemGroup>
 </Project>

dotnet/test/StackExchange.StacksIcons.Test.csproj

@@ -9,9 +9,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>