Bump OpenMcdf and Polyfill

Bumps OpenMcdf from 2.4.1 to 3.0.1
Bumps Polyfill from 8.7.3 to 8.7.4

---
updated-dependencies:
- dependency-name: OpenMcdf
  dependency-version: 3.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Polyfill
  dependency-version: 8.7.4
  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

@@ -7,8 +7,8 @@
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.2" />
     <PackageVersion Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-    <PackageVersion Include="OpenMcdf" Version="2.4.1" />
-    <PackageVersion Include="Polyfill" Version="8.7.3" />
+    <PackageVersion Include="OpenMcdf" Version="3.0.1" />
+    <PackageVersion Include="Polyfill" Version="8.7.4" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.156" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.XunitV3" Version="30.6.0" />