Bump Verify.DiffPlex from 2.3.0 to 3.0.0 (#128)

Bumps [Verify.DiffPlex](https://github.com/VerifyTests/Verify.DiffPlex) from 2.3.0 to 3.0.0.
- [Release notes](https://github.com/VerifyTests/Verify.DiffPlex/releases)
- [Commits](VerifyTests/Verify.DiffPlex@2.3.0...3.0.0)

---
updated-dependencies:
- dependency-name: Verify.DiffPlex
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

SourceGenerator/Akade.IndexedSet.InternalSourceGenerator.Tests/Akade.IndexedSet.InternalSourceGenerator.Tests.csproj

@@ -15,7 +15,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Verify.DiffPlex" Version="2.3.0" />
+    <PackageReference Include="Verify.DiffPlex" Version="3.0.0" />
     <PackageReference Include="Verify.MSTest" Version="23.7.2" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.2.0" />
   </ItemGroup>