Bump MessagePack from 3.1.4 to 3.1.7

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-version: 3.1.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/Platforms/Exceptionless.MessagePack/Exceptionless.MessagePack.csproj

@@ -25,6 +25,6 @@
   </PropertyGroup>
 
   <ItemGroup Label="Package References">
-    <PackageReference Include="MessagePack" Version="3.1.4" />
+    <PackageReference Include="MessagePack" Version="3.1.7" />
   </ItemGroup>
 </Project>