Bump Akka.Persistence.SqlServer.Hosting, Microsoft.Extensions.Configuration.EnvironmentVariables and Microsoft.Extensions.Configuration.Json

Bumps [Akka.Persistence.SqlServer.Hosting](https://github.com/akkadotnet/Akka.Persistence.SqlServer), Microsoft.Extensions.Configuration.EnvironmentVariables and Microsoft.Extensions.Configuration.Json. These dependencies needed to be updated together.

Updates `Akka.Persistence.SqlServer.Hosting` from 1.5.13 to 1.5.15
- [Release notes](https://github.com/akkadotnet/Akka.Persistence.SqlServer/releases)
- [Changelog](https://github.com/akkadotnet/Akka.Persistence.SqlServer/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/Akka.Persistence.SqlServer@1.5.13...1.5.15)

Updates `Microsoft.Extensions.Configuration.EnvironmentVariables` from $MicrosoftExtensionsVersion to 6.0.0

Updates `Microsoft.Extensions.Configuration.Json` from $MicrosoftExtensionsVersion to 6.0.0

---
updated-dependencies:
- dependency-name: Akka.Persistence.SqlServer.Hosting
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.Extensions.Configuration.EnvironmentVariables
  dependency-type: direct:production
- dependency-name: Microsoft.Extensions.Configuration.Json
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/clustering/sharding-sqlserver/SqlSharding.Host/SqlSharding.Host.csproj

@@ -12,7 +12,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Akka.Persistence.SqlServer.Hosting" Version="1.5.13" />
+        <PackageReference Include="Akka.Persistence.SqlServer.Hosting" Version="1.5.15" />
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="$(MicrosoftExtensionsVersion)" />
         <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="$(MicrosoftExtensionsVersion)" />
         <PackageReference Include="Petabridge.Cmd.Cluster" Version="$(PbmVersion)" />