ImageExport: bump puppeteersharp dep

Author: kMutagene

Diff for: src/Plotly.NET.ImageExport/Plotly.NET.ImageExport.fsproj

@@ -36,7 +36,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Plotly.NET\Plotly.NET.fsproj" PackageVersion="[5.0.0, 6.0.0)" />
-    <PackageReference Include="PuppeteerSharp" Version="18.0.0" />
+    <PackageReference Include="PuppeteerSharp" Version="20.0.5" />
   </ItemGroup>
   <Target Name="UseExplicitPackageVersions" BeforeTargets="GenerateNuspec">
     <ItemGroup>