building an ig is giving me a heap space error. about fhir-ig-action HOT 6 CLOSED

# This is a basic workflow to build a FHIR-IG and publish the output (docs folder) 
# on Git Hub Pages everytime it is pushed to the main branch

name: Build and Deploy

# Controls when the workflow will run
on:
  # Triggers the workflow on push or pull request events but only for the "main" branch
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

permissions:
  contents: write
jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout 🛎️
        uses: actions/checkout@v3
      - name: FHIR IG Action   # action from the GitHub Marketplace
        # uses: Healthedata1/[email protected]
        uses: qligier/fhir-ig-action@feature_memory_debug
        with:
          java-flags: "-Xmx4G"
          sushi: "3.2.0"
      - name: Deploy to GitHub Pages  # action from the GitHub Marketplace
        uses: JamesIves/[email protected]
        with:
          folder: docs # deploy from the docs from the prior step