Bump xunit.extensibility.execution from 2.6.2 to 2.6.3 in /src

Bumps [xunit.extensibility.execution](https://github.com/xunit/xunit) from 2.6.2 to 2.6.3.
- [Commits](xunit/xunit@2.6.2...2.6.3)

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

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

src/XunitContext/XunitContext.csproj

@@ -13,6 +13,6 @@
     <PackageReference Include="ProjectDefaults" Version="1.0.106" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
     <PackageReference Include="xunit.assert" Version="2.6.2" />
-    <PackageReference Include="xunit.extensibility.execution" Version="2.6.2" />
+    <PackageReference Include="xunit.extensibility.execution" Version="2.6.3" />
   </ItemGroup>
 </Project>