Bump StackExchange.Redis from 2.7.33 to 2.8.0

Bumps [StackExchange.Redis](https://github.com/StackExchange/StackExchange.Redis) from 2.7.33 to 2.8.0.
- [Release notes](https://github.com/StackExchange/StackExchange.Redis/releases)
- [Changelog](https://github.com/StackExchange/StackExchange.Redis/blob/main/docs/ReleaseNotes.md)
- [Commits](StackExchange/StackExchange.Redis@2.7.33...2.8.0)

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

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

Directory.Packages.props

@@ -55,7 +55,7 @@
     <PackageVersion Include="NLog.Owin.Logging" Version="4.0.0" />
     <PackageVersion Include="NLog.Web" Version="5.3.11" />
     <PackageVersion Include="RichardSzalay.MockHttp" Version="7.0.0" />
-    <PackageVersion Include="StackExchange.Redis" Version="2.7.33" />
+    <PackageVersion Include="StackExchange.Redis" Version="2.8.0" />
     <PackageVersion Include="Sustainsys.Saml2.AspNetCore2" Version="2.9.2" />
     <PackageVersion Include="Sustainsys.Saml2.Owin" Version="2.9.2" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />