Update dependency Microsoft.AspNetCore.SignalR.StackExchangeRedis to v6.0.21 [SECURITY]

Author: renovate[bot]

src/Infrastructure/Eiromplays.IdentityServer.Infrastructure/Eiromplays.IdentityServer.Infrastructure.csproj

@@ -52,7 +52,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="6.0.6" />
     <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="6.0.6" />
     <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="6.0.6" />
-    <PackageReference Include="Microsoft.AspNetCore.SignalR.StackExchangeRedis" Version="6.0.6" />
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.StackExchangeRedis" Version="6.0.21" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>