Bump the nuget group with 1 update

Bumps MessagePack to 2.5.301

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-version: 2.5.301
  dependency-type: direct:production
  dependency-group: nuget
- dependency-name: MessagePack
  dependency-version: 2.5.301
  dependency-type: direct:production
  dependency-group: nuget
...

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

Author: dependabot[bot]

Backgammon.AppHost/Backgammon.AppHost.csproj

@@ -12,6 +12,7 @@
     <PackageReference Include="Aspire.Hosting.Orleans" Version="13.3.5" />
     <PackageReference Include="Aspire.Hosting.PostgreSQL" Version="13.3.5" />
     <PackageReference Include="Aspire.Hosting.Redis" Version="13.3.5" />
+    <PackageReference Include="MessagePack" Version="2.5.301" />
   </ItemGroup>
 
   <ItemGroup>

Backgammon.Server/Backgammon.Server.csproj

@@ -23,6 +23,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="MessagePack" Version="2.5.301" />
     <PackageReference Include="Microsoft.Orleans.Server" Version="9.*" />
     <PackageReference Include="Microsoft.Orleans.Persistence.AdoNet" Version="9.*" />
     <PackageReference Include="Npgsql" Version="10.*" />