Update .gitlab-ci.yml

.gitlab-ci.yml

 image: beagle/sphinx-build-env:latest
 
 stages:
-  - deploy-main
+  - deploy-latest
   - deploy-branch
   - deploy-tag
 
 pages:
-  stage: deploy-main
+  stage: deploy-latest
   script:
   - sphinx-build -b html . public/latest/
   - sphinx-build -M latexpdf . public/latest/
@@ -16,7 +16,7 @@ pages:
     paths:
     - public
   rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
       when: always
 
 pages:
@@ -29,7 +29,7 @@ pages:
     paths:
     - public
   rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
       when: never
     - if: $CI_COMMIT_BRANCH
       when: always
@@ -40,7 +40,8 @@ pages:
   - export GIT_BRANCH=$(git branch -a --contains tags/$CI_COMMIT_TAG | grep origin | sed 's/.*origin\///'`
   - sphinx-build -b html . public/$GIT_BRANCH/
   - sphinx-build -M latexpdf . public/$GIT_BRANCH/
-  - mv public/latex/beagleboard-docs.pdf public/$GIT_BRANCH/
+  - mv public/latex/beagleboard-docs.pdf public/$GIT_BRANCH/beagleboard-docs-$CI_COMMIT_TAG.pdf
+  - ln -s public/latex/beagleboard-docs-$CI_COMMIT_TAG.pdf public/$GIT_BRANCH/beagleboard-docs.pdf
   artifacts:
     paths:
     - public