Bump Akka.Cluster.Sharding from 1.5.42 to 1.5.51

---
updated-dependencies:
- dependency-name: Akka.Cluster.Sharding
  dependency-version: 1.5.51
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -1,7 +1,7 @@
 <Project>
     <PropertyGroup>
         <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-        <AkkaVersion>1.5.42</AkkaVersion>
+        <AkkaVersion>1.5.51</AkkaVersion>
         <AkkaHostingVersion>1.5.42</AkkaHostingVersion>
     </PropertyGroup>
     <!-- Library dependencies -->