fixup! feat(ng-dev): add conditional autosquash merge strategy

Author: alan-agius4

.github/local-actions/branch-manager/main.js

@@ -79,8 +79,7 @@ export function assertValidPullRequestConfig<T extends NgDevConfig>(
     );
   }
 
-  const {githubApiMerge} = config.pullRequest;
-  if (githubApiMerge === undefined) {
+  if (config.pullRequest.githubApiMerge === undefined) {
     errors.push('No explicit choice of merge strategy. Please set `githubApiMerge`.');
   }