Bump Markdig from 0.42.0 to 0.43.0 (#10864)

---
updated-dependencies:
- dependency-name: Markdig
  dependency-version: 0.43.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -8,7 +8,7 @@
     <PackageVersion Include="ICSharpCode.Decompiler" Version="9.1.0.7988" />
     <PackageVersion Include="Jint" Version="4.4.1" />
     <PackageVersion Include="JsonSchema.Net" Version="7.4.0" />
-    <PackageVersion Include="Markdig" Version="0.42.0" />
+    <PackageVersion Include="Markdig" Version="0.43.0" />
     <PackageVersion Include="Microsoft.Playwright" Version="1.55.0" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="OneOf" Version="3.0.271" />