Update build.yaml

Author: jenningsloy318

.github/workflows/build.yaml

@@ -22,4 +22,4 @@ jobs:
         upstream_repository: youngyangyang04/leetcode-master
         upstream_branch: master
         target_branch: master
-        git_pull_args: '--allow-unrelated-histories'
+        git_pull_args: --allow-unrelated-histories --rebase=merges  -ff