Update .gitlab-ci.yml

.gitlab-ci.yml

 unittest:
-    image: debian:stretch
-    stage: test
-    script:
+  image: debian:stretch
+  stage: test
+  script:
     - apt update
     - uname -a
     - apt install -y locales-all git build-essential  make libavformat-dev libavcodec-dev libavfilter-dev libavutil-dev libxml2-dev libcurl4-openssl-dev
     - make
-    artifacts:
-        paths:
-	- probe
-	- probe-raw
-	- remux thumbnail
-	- transcode
-	- publish_video
-	- simple_live_transcode
+  artifacts:
+    paths:
+      - probe
+      - probe-raw
+      - remux thumbnail
+      - transcode
+      - publish_video
+      - simple_live_transcode
\ No newline at end of file