Bump AngleSharp and HtmlSanitizer

Bumps AngleSharp from 0.16.1 to 1.4.0
Bumps HtmlSanitizer from 6.0.453 to 9.0.886

---
updated-dependencies:
- dependency-name: AngleSharp
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: HtmlSanitizer
  dependency-version: 9.0.886
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -14,7 +14,7 @@
 		<PackageVersion Include="LearningHub.Nhs.Models" Version="3.0.48" />
 		<PackageVersion Include="UK.NHS.CookieBanner" Version="2.0.7" />
 
-		<PackageVersion Include="AngleSharp" Version="0.16.1" />
+		<PackageVersion Include="AngleSharp" Version="1.4.0" />
 		<PackageVersion Include="AspNetCore.Authentication.ApiKey" Version="9.0.0" />
 		<PackageVersion Include="AspNetCoreRateLimit" Version="5.0.0" />
 		<PackageVersion Include="AutoFixture" Version="4.18.1" />
@@ -31,7 +31,7 @@
 		<PackageVersion Include="FluentValidation" Version="12.1.0" />
 		<PackageVersion Include="FluentValidation.AspNetCore" Version="11.3.1" />
 		<PackageVersion Include="HtmlAgilityPack" Version="1.12.4" />
-		<PackageVersion Include="HtmlSanitizer" Version="6.0.453" />
+		<PackageVersion Include="HtmlSanitizer" Version="9.0.886" />
 		<PackageVersion Include="IdentityModel" Version="4.6.0" />
 		<PackageVersion Include="IdentityServer4.AccessTokenValidation" Version="3.0.1" />
 		<PackageVersion Include="linqtotwitter" Version="6.9.0" />