Bump Polyfill from 1.33.2 to 1.34.0 in /src (#682)

Bumps [Polyfill](https://github.com/SimonCropp/Polyfill) from 1.33.2 to 1.34.0.
- [Commits](https://github.com/SimonCropp/Polyfill/commits/1.34.0)

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

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Author: dependabot[bot]

src/MarkdownSnippets/MarkdownSnippets.csproj

@@ -6,7 +6,7 @@
   <ItemGroup>
     <PackageReference Include="ProjectDefaults" Version="1.0.107" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
-    <PackageReference Include="Polyfill" Version="1.33.2" PrivateAssets="all" />
+    <PackageReference Include="Polyfill" Version="1.34.0" PrivateAssets="all" />
     <PackageReference Include="System.Memory" Version="4.5.5" Condition="'$(TargetFrameworkIdentifier)' == '.NETStandard' OR '$(TargetFrameworkIdentifier)' == '.NETFramework' OR '$(TargetFrameworkIdentifier)' == '.NETCOREAPP'" />
   </ItemGroup>
 </Project>