chore(deps): update dependency system.linq.async to v7

Author: renovate[bot]

src/CompanyCalendar.App.WinForms/CompanyCalendar.App.WinForms.csproj

@@ -41,7 +41,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="9.0.14" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.14" />
-    <PackageReference Include="System.Linq.Async" Version="6.0.3" />
+    <PackageReference Include="System.Linq.Async" Version="7.0.0" />
   </ItemGroup>
 
   <ItemGroup>

src/CompanyCalendar.Tests/CompanyCalendar.Tests.csproj

@@ -17,7 +17,7 @@
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.14" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="9.0.14" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
-    <PackageReference Include="System.Linq.Async" Version="6.0.3" />
+    <PackageReference Include="System.Linq.Async" Version="7.0.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>