Update vstest monorepo to 18.12.0

.gitea/workflows/Merge.yaml

@@ -22,7 +22,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup .NET
-        uses: actions/setup-dotnet@v6
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: |
             10.x

.gitea/workflows/Quality.yaml

@@ -24,7 +24,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup .NET
-        uses: actions/setup-dotnet@v6
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: |
             10.x

src/LittleTown.Core.Tests/LittleTown.Core.Tests.csproj

@@ -11,8 +11,8 @@
 
   <ItemGroup>
     <PackageReference Include="AutoMapper" Version="16.0.0" />
-    <PackageReference Include="Microsoft.CodeCoverage" Version="18.0.1" />
+    <PackageReference Include="Microsoft.CodeCoverage" Version="18.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">