chore(deps): update dependency recipeengine.api to v15

Author: unity-renovate[bot]

Tools/CI/NGO.Cookbook.csproj

@@ -9,7 +9,7 @@
 
     <ItemGroup>
         <PackageReference Include="RecipeEngine" Version="9.1.0" />
-        <PackageReference Include="RecipeEngine.Api" Version="14.1.0" />
+        <PackageReference Include="RecipeEngine.Api" Version="15.0.0" />
         <PackageReference Include="RecipeEngine.Api.Extensions" Version="8.1.1" />
         <PackageReference Include="RecipeEngine.Modules.Api" Version="6.1.0" />
         <PackageReference Include="RecipeEngine.Modules.Wrench" Version="3.2.0" />