Update dependency AutoMapper to v15 [SECURITY]

Author: renovate[bot]

src/GovUK.Dfe.CoreLibs.Testing/GovUK.Dfe.CoreLibs.Testing.csproj

@@ -19,7 +19,7 @@
 		<PackageReference Include="AutoFixture" Version="4.18.1" />
 		<PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.18.1" />
 		<PackageReference Include="AutoFixture.Xunit2" Version="4.18.1" />
-		<PackageReference Include="AutoMapper" Version="14.0.0" />
+		<PackageReference Include="AutoMapper" Version="15.1.3" />
 		<PackageReference Include="Azure.Identity" Version="1.17.0" />
 		<PackageReference Include="GovUK.Dfe.CoreLibs.Utilities" Version="1.0.16" />
 		<PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.14" />