Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -8,8 +8,8 @@ build:
   stage: build
   # instead of calling g++ directly you can also use some build toolkit like make
   # install the necessary build tools when needed
-  # before_script:
-  apt update && apt -y install make autoconf
+  before_script:
+    - apt update && apt -y install make autoconf
   script:
     - qmake
     - make