Bump Cake.Issues.Testing from 2.0.0-beta0001 to 2.0.0 in /src

Bumps [Cake.Issues.Testing](https://github.com/cake-contrib/Cake.Issues) from 2.0.0-beta0001 to 2.0.0.
- [Release notes](https://github.com/cake-contrib/Cake.Issues/releases)
- [Changelog](https://github.com/cake-contrib/Cake.Issues/blob/develop/GitReleaseManager.yaml)
- [Commits](https://github.com/cake-contrib/Cake.Issues/commits/2.0.0)

---
updated-dependencies:
- dependency-name: Cake.Issues.Testing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Cake.Issues.DupFinder.Tests/Cake.Issues.DupFinder.Tests.csproj

@@ -18,7 +18,7 @@
 
   <ItemGroup>
     <PackageReference Include="Cake.Issues" Version="2.0.0" />
-    <PackageReference Include="Cake.Issues.Testing" Version="2.0.0-beta0001" />
+    <PackageReference Include="Cake.Issues.Testing" Version="2.0.0" />
     <PackageReference Include="Cake.Testing" Version="2.0.0" />
     <PackageReference Include="Shouldly" Version="4.0.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">