chore(deps): bump Confluent.SchemaRegistry from 2.2.0 to 2.3.0

Bumps [Confluent.SchemaRegistry](https://github.com/confluentinc/confluent-kafka-dotnet) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/confluentinc/confluent-kafka-dotnet/releases)
- [Changelog](https://github.com/confluentinc/confluent-kafka-dotnet/blob/master/CHANGELOG.md)
- [Commits](confluentinc/confluent-kafka-dotnet@v2.2.0...v2.3.0)

---
updated-dependencies:
- dependency-name: Confluent.SchemaRegistry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

samples/KafkaSchemaRegistry/Greetings/Greetings.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
@@ -12,7 +12,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
-    <PackageReference Include="Confluent.SchemaRegistry" Version="2.2.0" />
+    <PackageReference Include="Confluent.SchemaRegistry" Version="2.3.0" />
     <PackageReference Include="Confluent.SchemaRegistry.Serdes.Json" Version="2.2.0" />
   </ItemGroup>
 </Project>

samples/KafkaSchemaRegistry/GreetingsReceiverConsole/GreetingsReceiverConsole.csproj

@@ -1,10 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Confluent.SchemaRegistry" Version="2.2.0" />
+    <PackageReference Include="Confluent.SchemaRegistry" Version="2.3.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />