Bump PGCG.commonItems from 15.1.3 to 15.1.4 in /Fronter.NET.Tests (#756)

Bumps [PGCG.commonItems](https://github.com/ParadoxGameConverters/commonItems.NET) from 15.1.3 to 15.1.4.
- [Commits](ParadoxGameConverters/PGCG.commonItems@15.1.3...15.1.4)

---
updated-dependencies:
- dependency-name: PGCG.commonItems
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Fronter.NET/Fronter.csproj

@@ -79,7 +79,7 @@
         <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0" />
         <PackageReference Include="Mono.Posix.NETStandard" Version="1.0.0" />
         <PackageReference Include="Notification.Avalonia" Version="2.1.0" />
-        <PackageReference Include="PGCG.commonItems" Version="15.1.3" />
+        <PackageReference Include="PGCG.commonItems" Version="15.1.4" />
         <PackageReference Include="Roslynator.Analyzers" Version="4.12.10">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>