Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -18,7 +18,7 @@ lint:
   image: python:3.10
   before_script :
     - pip install --upgrade pip
-    -pip install flake8
+    - pip install flake8
   script:
     - echo "Linting Python code.."
     - flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics