chore(deps): update mstest monorepo to 3.7.1

| datasource | package              | from  | to    |
| ---------- | -------------------- | ----- | ----- |
| nuget      | MSTest.TestAdapter   | 3.7.0 | 3.7.1 |
| nuget      | MSTest.TestFramework | 3.7.0 | 3.7.1 |

Author: renovate[bot]

EPPlusTest/EPPlusTest.csproj

@@ -26,8 +26,8 @@
   <ItemGroup>
     <PackageReference Include="FakeItEasy" Version="8.3.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.7.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.7.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.7.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.7.1" />
     <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
   </ItemGroup>