Bump MessagePack from 3.1.1 to 3.1.2

Bumps [MessagePack](https://github.com/MessagePack-CSharp/MessagePack-CSharp) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/MessagePack-CSharp/MessagePack-CSharp/releases)
- [Commits](MessagePack-CSharp/MessagePack-CSharp@v3.1.1...v3.1.2)

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/FluentCommand.Caching/FluentCommand.Caching.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MessagePack" Version="3.1.1" />
+    <PackageReference Include="MessagePack" Version="3.1.2" />
     <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="9.0.1" />
   </ItemGroup>