Update dependency Microsoft.Extensions.Http to v9

Author: renovate[bot]

Jellyfin.Plugin.OpenSubtitles/Jellyfin.Plugin.OpenSubtitles.csproj

@@ -19,7 +19,7 @@
   <ItemGroup>
     <PackageReference Include="Jellyfin.Common" Version="10.*-*" />
     <PackageReference Include="Jellyfin.Controller" Version="10.*-*" />
-    <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.0" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>