Update names in GitHub Actions

.github/workflows/test_migrations.yml

@@ -1,4 +1,4 @@
-name: Tests
+name: Test migrations
 
 on:
   push:
@@ -41,7 +41,7 @@ jobs:
           python -m pip install --upgrade poetry
           poetry install --with development
 
-      - name: pytest
+      - name: Check migrations
         run: |
           poetry run python manage.py migrate
           poetry run python manage.py makemigrations --check