Update paths in the repository's CI workflows

.github/workflows/libraries_compile-examples.yml

@@ -15,6 +15,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
+    env:
+      PYTHON_PROJECT_PATH: ${GITHUB_WORKSPACE}/compilesketches
+      PYTHON_PROJECT_TESTS_PATH: ${GITHUB_WORKSPACE}/compilesketches/tests
+
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -27,18 +31,18 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install --requirement "$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches/tests/requirements.txt"
+          pip install --requirement "${{ env.PYTHON_PROJECT_TESTS_PATH }}/requirements.txt"
 
       - name: Lint with flake8
         run: |
           pip install --quiet flake8
           pip install --quiet pep8-naming
-          flake8 --config "$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches/.flake8" --show-source "$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches"
+          flake8 --config "${{ env.PYTHON_PROJECT_PATH }}/.flake8" --show-source "${{ env.PYTHON_PROJECT_PATH }}"
 
       - name: Run Python unit tests and report code coverage
         run: |
-          export PYTHONPATH="$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches"
-          coverage run --source="$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches" --module pytest "$GITHUB_WORKSPACE/libraries/compile-examples/compilesketches/tests"
+          export PYTHONPATH="${{ env.PYTHON_PROJECT_PATH }}"
+          coverage run --source="${{ env.PYTHON_PROJECT_PATH }}" --module pytest "${{ env.PYTHON_PROJECT_TESTS_PATH }}"
           # Display code coverage report in workflow run log
           coverage report
 

.github/workflows/spell-check.yml

@@ -11,7 +11,6 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Spell check
-        uses: ./libraries/spell-check
+        uses: arduino/actions/libraries/spell-check@master
         with:
           ignore-words-list: etc/codespell-ignore-words-list.txt
-          skip-paths: ./libraries/spell-check/test/testdata,./setup-taskfile/node_modules,./setup-taskfile/package-lock.json