Update Microsoft.Sbom.Targets to 4.0.3

---
updated-dependencies:
- dependency-name: Microsoft.Sbom.Targets
  dependency-version: 4.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.5" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.5" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
-    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.0.2" />
+    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.0.3" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.152" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.Http" Version="6.5.0" />