Fix registerGenerateCargoWorkspaceTask() to declare the output file. #5930

	# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
	# SPDX-License-Identifier: Apache-2.0

	# This workflow runs CI for pull requests from forks, which can't make use of secrets.

	name: CI (from fork)
	on:
	pull_request:

	# Allow one instance of this workflow per pull request, and cancel older runs when new changes are pushed
	concurrency:
	group: ci-forks-yaml-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	# This job detects if the PR made changes to build tools. If it did, then it builds a new
	# build Docker image. Otherwise, it downloads a build image from Public ECR. In both cases,
	# it uploads the image as a build artifact for other jobs to download and use.
	acquire-base-image:
	name: Acquire Base Image
	if: ${{ github.event.pull_request.head.repo.full_name != 'smithy-lang/smithy-rs' }}
	runs-on: ubuntu-latest
	timeout-minutes: 60
	steps:
	- uses: actions/checkout@v4
	with:
	path: smithy-rs
	- name: Acquire base image
	id: acquire
	env:
	DOCKER_BUILDKIT: 1
	run: ./smithy-rs/.github/scripts/acquire-build-image
	- name: Upload base image
	uses: actions/upload-artifact@v4
	with:
	name: smithy-rs-base-image
	path: smithy-rs-base-image
	retention-days: 1

	# Run shared CI after the Docker build image has either been rebuilt or found in ECR
	ci:
	needs: acquire-base-image
	if: ${{ github.event.pull_request.head.repo.full_name != 'smithy-lang/smithy-rs' }}
	uses: ./.github/workflows/ci.yml
	with:
	run_canary: false
	run_sdk_examples: true

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