Rename stage, name ubuntu explicate, add new lines per step

.github/workflows/django.yml

@@ -3,9 +3,8 @@ name: Test
 on: [push, pull_request]
 
 jobs:
-  build:
-
-    runs-on: ubuntu-latest
+  test:
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
@@ -16,6 +15,7 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+
     - name: Cache pip
       uses: actions/cache@v2
       with:
@@ -25,12 +25,14 @@ jobs:
           ${{ runner.os }}-pip-${{ matrix.python-version }}
           ${{ runner.os }}-pip-
           ${{ runner.os }}-
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install coveralls
         pip install -r requirements.txt
         echo "PASSWORD_HASHERS = ['django.contrib.auth.hashers.MD5PasswordHasher',]" >> src/settings.py
+
     - name: Static tests
       env:
         PYTHONWARNINGS: all