fix: add max memory in github action for validation

Author: ryscheng

.github/workflows/validate/action.yml

@@ -54,6 +54,7 @@ runs:
     - name: Run validation
       shell: bash
       run: |
+        export NODE_OPTIONS="--max_old_space_size=4096"
         cd oso/ops/external-prs && pnpm tools ossd validate-pr --duckdb-memory-limit 4GB ${{ inputs.pr }} ${{ inputs.sha }} ../../../main ../../../pr
       env:
         PR_TOOLS_REPO: ${{ github.repository }}