Update Directory.Packages.props

Author: SimonCropp

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="Verify" Version="31.13.2" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.NUnit" Version="31.13.2" />
-    <PackageVersion Include="NUnit" Version="4.5.0" />
+    <PackageVersion Include="NUnit" Version="4.5.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.1.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
   </ItemGroup>