Update dependency ApprovalTests to v7

Author: renovate[bot]

Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="ApprovalTests" Version="6.0.0" />
+    <PackageVersion Include="ApprovalTests" Version="7.0.0" />
     <PackageVersion Include="Avalonia" Version="[11.0.0,12.0.0)" />
     <PackageVersion Include="Avalonia.Desktop" Version="11.3.4" />
     <PackageVersion Include="Avalonia.Diagnostics" Version="11.3.4" />