correct fix to migrateProjectConfig

Author: cscheid

src/project/project-context.ts

@@ -657,7 +657,10 @@ async function resolveProjectExtension(
 // TODO make this a deprecation warning
 function migrateProjectConfig(projectConfig: ProjectConfig) {
   const kSite = "site";
-  if (projectConfig[kSite] === undefined) {
+  if (
+    projectConfig.project[kProjectType] !== kSite &&
+    projectConfig[kSite] === undefined
+  ) {
     return projectConfig;
   }