Bump DiffEngine from 12.4.2 to 13.0.1

Bumps [DiffEngine](https://github.com/VerifyTests/DiffEngine) from 12.4.2 to 13.0.1.
- [Release notes](https://github.com/VerifyTests/DiffEngine/releases)
- [Commits](https://github.com/VerifyTests/DiffEngine/commits)

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

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

src/ApprovalTests/ApprovalTests.csproj

@@ -11,7 +11,7 @@
     <Using Remove="System.Net.Http" />
     <PackageReference Include="Polyfill" Version="1.32.1" PrivateAssets="all" />
     <Compile Include="..\ApprovalUtilities\InternalsVisibleTo.cs" Link="InternalsVisibleTo.cs" />
-    <PackageReference Include="DiffEngine" Version="12.4.2" />
+    <PackageReference Include="DiffEngine" Version="13.0.1" />
     <PackageReference Include="EmptyFiles" Version="4.6.0" PrivateAssets="None" />
     <PackageReference Include="Fody" Version="6.8.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />