Bump NSubstitute from 5.1.0 to 5.3.0

Bumps NSubstitute from 5.1.0 to 5.3.0.

---
updated-dependencies:
- dependency-name: NSubstitute
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/TestEngine/testcentric.engine.tests/testcentric.engine.tests.csproj

@@ -37,7 +37,7 @@
     </ItemGroup>
 
 	<ItemGroup>
-        <PackageReference Include="NSubstitute" Version="5.1.0" />
+        <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="4.1.0" />
         <PackageReference Include="NUnitLite" Version="4.1.0" />
     </ItemGroup>