Bump HtmlSanitizer from 8.0.795 to 9.0.884

Bumps [HtmlSanitizer](https://github.com/mganss/HtmlSanitizer) from 8.0.795 to 9.0.884.
- [Release notes](https://github.com/mganss/HtmlSanitizer/releases)
- [Commits](mganss/HtmlSanitizer@v8.0.795...v9.0.884)

---
updated-dependencies:
- dependency-name: HtmlSanitizer
  dependency-version: 9.0.884
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

DigitalLearningSolutions.Web/DigitalLearningSolutions.Web.csproj

@@ -68,7 +68,7 @@
         <PackageReference Include="FuzzySharp" Version="2.0.2" />
         <PackageReference Include="GDS.MultiPageFormData" Version="1.0.6" />
         <PackageReference Include="HtmlAgilityPack" Version="1.11.74" />
-        <PackageReference Include="HtmlSanitizer" Version="8.0.795" />
+        <PackageReference Include="HtmlSanitizer" Version="9.0.884" />
         <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.13" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="6.0.24" />
         <PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.1" />