ci: Update actions to resolve job run failure. (#807)

Author: microbit-carlos

.github/workflows/build.yml

@@ -11,10 +11,10 @@ jobs:
  runs-on: ubuntu-20.04
  name: Build MicroPython
  steps:
- - uses: actions/checkout@v2
+ - uses: actions/checkout@v4
  # Yotta has some issues with Python 3.7+
  - name: Install Python 3.6
- uses: actions/setup-python@v3
+ uses: actions/setup-python@v5
  with:
  python-version: 3.6
  - name: Install GNU Arm Embedded Toolchain (arm-none-eabi-gcc)
@@ -41,9 +41,9 @@ jobs:
  - run: make all
  - name: Process date for artifact filename
  id: date
- run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
+ run: echo "BUILD_DATE=$(date +'%Y-%m-%d')" >> $GITHUB_ENV
  - name: Upload hex file
- uses: actions/upload-artifact@v1
+ uses: actions/upload-artifact@v4
  with:
- name: microbitv1-micropython-${{ steps.date.outputs.date }}-${{ github.sha }}.hex
+ name: microbitv1-micropython-${{ env.BUILD_DATE }}-${{ github.sha }}.hex
  path: build/firmware.hex