Bump Polyfill from 7.5.0 to 7.6.0 in /src (#73)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -7,7 +7,7 @@
     <PackageVersion Include="FluentAssertions" Version="7.0.0" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageVersion Include="Polyfill" Version="7.5.0" />
+    <PackageVersion Include="Polyfill" Version="7.6.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
     <PackageVersion Include="Shouldly" Version="4.2.1" />
     <PackageVersion Include="Verify" Version="28.4.0" />