Bump xunit.abstractions and xunit

Bumps [xunit.abstractions](https://github.com/xunit/xunit) and [xunit](https://github.com/xunit/xunit). These dependencies needed to be updated together.

Updates `xunit.abstractions` from 2.0.3 to 2.0.3
- [Commits](https://github.com/xunit/xunit/commits)

Updates `xunit` from 2.9.2 to 2.9.3
- [Commits](xunit/xunit@v2-2.9.2...v2-2.9.3)

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

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

test/DynamoDBv2.Transactions.IntegrationTests/DynamoDBv2.Transactions.IntegrationTests.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.abstractions" Version="2.0.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>

test/DynamoDBv2.Transactions.UnitTests/DynamoDBv2.Transactions.UnitTests.csproj

@@ -17,7 +17,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.abstractions" Version="2.0.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>