Bump FluentAssertions from 5.10.2 to 5.10.3 (#99)

Author: dependabot-preview[bot]

src/Akka.Logger.Serilog.Tests/Akka.Logger.Serilog.Tests.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <PackageReference Include="Akka.TestKit.Xunit2" Version="$(AkkaVersion)" />
-    <PackageReference Include="FluentAssertions" Version="5.10.2" />
+    <PackageReference Include="FluentAssertions" Version="5.10.3" />
     <PackageReference Include="Serilog.Sinks.ColoredConsole" Version="3.0.1" />
   </ItemGroup>