Update .gitlab-ci.yml

.gitlab-ci.yml

 image: python:3.8.5-buster
 
 stages:
-  - Get dependencies
-  - Static Analysis
-  - Docker build
+  - get-dependencies
+  - static-analysis
+  - docker-build
 
 variables:
   # git tag or branch name
@@ -15,18 +15,18 @@ include:
     file: /docker-build.yaml
 
 pip:
-  stage: Get dependencies
+  stage: get-dependencies
   script:
     - pip install -r requirements.txt
 
 flake8:
-  stage: Static Analysis
+  stage: static-analysis
   script:
     - pip install flake8
     - flake8 --max-line-length=120 *.py
 
 pylint:
-  stage: Static Analysis
+  stage: static-analysis
   allow_failure: true
   script:
     - pip install pylint