Bump DiffEngine from 20.2.0 to 20.2.1

---
updated-dependencies:
- dependency-name: DiffEngine
  dependency-version: 20.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -17,7 +17,7 @@
     <PackageVersion Include="xunit.v3" Version="4.0.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="Argon" Version="0.36.0" />
-    <PackageVersion Include="DiffEngine" Version="20.2.0" />
+    <PackageVersion Include="DiffEngine" Version="20.2.1" />
     <PackageVersion Include="EmptyFiles" Version="8.18.2" />
     <PackageVersion Include="SimpleInfoName" Version="3.2.0" />
   </ItemGroup>