Bump Akka.Discovery.Azure from 1.5.63 to 1.5.68

---
updated-dependencies:
- dependency-name: Akka.Discovery.Azure
  dependency-version: 1.5.68
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/clustering/cluster-bootstrap/Aspire/SimpleCluster.Node/SimpleCluster.Node.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Akka.Cluster.Hosting" Version="$(AkkaHostingVersion)" />
-    <PackageReference Include="Akka.Discovery.Azure" Version="1.5.63" />
+    <PackageReference Include="Akka.Discovery.Azure" Version="1.5.68" />
     <PackageReference Include="Akka.Management" Version="1.5.63" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="$(MicrosoftExtensionsVersion)" />
   </ItemGroup>