Warning: Unexpected input(s) 'build_args'

When performing the following operation from a Rails app:

```
- name: Build and push image to ECR
id: build_push_docker_image
uses: appleboy/docker-ecr-action@master
env:
REPOSITORY_REGISTRY: XXXX
REPOSITORY_NAME: application
MASTER_KEY: ${{ secrets.RAILS_MASTER_KEY }}
with:
access_key: ${{ secrets.AWS_ACCESS_KEY_ID }}
secret_key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
region: YYYY
cache_from: ${{ env.REPOSITORY_REGISTRY }}/${{ env.REPOSITORY_NAME }}
registry: ${{ env.REPOSITORY_REGISTRY }}
repo: ${{ env.REPOSITORY_NAME }}
dockerfile: Dockerfile
tags: stage-${{ github.sha }}
force_tag: true
build_args: |
"--secret id=master_key,env=MASTER_KEY"
```

Use the supplied GitHub Actions workflow as the reproduction case and inspect how the action declares inputs and invokes the Docker build. Confirm the warning disappears when build_args is provided and that the requested build argument is accepted during the image build.

Written by the indexing model from the issue text.