Bump ChemicalsBase from 8.0.10 to 8.0.21

---
updated-dependencies:
- dependency-name: ChemicalsBase
  dependency-version: 8.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn/BackendConfiguration.Pn.csproj

@@ -215,7 +215,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="ChemicalsBase" Version="8.0.10" />
+      <PackageReference Include="ChemicalsBase" Version="8.0.21" />
       <PackageReference Include="Google.Apis.Sheets.v4" Version="1.70.0.3819" />
       <PackageReference Include="HtmlToOpenXml.dll" Version="3.2.7" />
       <PackageReference Include="Ical.Net" Version="5.1.1" />