Fix workflow syntax (#2645)

Author: theirix

content/actions/guides/building-and-testing-python.md

@@ -365,26 +365,26 @@ jobs:
       matrix:
         python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
 
-      steps:
-      - uses: actions/checkout@v2
-      - name: Setup Python # Set Python version
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ matrix.python-version }}
-      # Install pip and pytest
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install pytest
-      - name: Test with pytest
-        run: pytest tests.py --doctest-modules --junitxml=junit/test-results-${{ matrix.python-version }}.xml
-      - name: Upload pytest test results
-        uses: actions/upload-artifact@v2
-        with:
-          name: pytest-results-${{ matrix.python-version }}
-          path: junit/test-results-${{ matrix.python-version }}.xml
-        # Use always() to always run this step to publish test results when there are test failures
-        if: ${{ always() }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Python # Set Python version
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    # Install pip and pytest
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pytest
+    - name: Test with pytest
+      run: pytest tests.py --doctest-modules --junitxml=junit/test-results-${{ matrix.python-version }}.xml
+    - name: Upload pytest test results
+      uses: actions/upload-artifact@v2
+      with:
+        name: pytest-results-${{ matrix.python-version }}
+        path: junit/test-results-${{ matrix.python-version }}.xml
+      # Use always() to always run this step to publish test results when there are test failures
+      if: ${{ always() }}
 ```
 {% endraw %}