Fix windows 1809 runner tag

.gitlab-ci.yml

@@ -25,7 +25,7 @@ build ubuntu-18.04:
 
 build windows-1809:
   stage: build
-  tags: [ windows1809, shell ]
+  tags: [ windows-1809, shell ]
   before_script:
     - echo "${CI_REGISTRY_PASSWORD}" | docker login -u "${CI_REGISTRY_USER}" "${CI_REGISTRY}" --password-stdin
     - Copy-Item 'C:/Windows/System32/opengl32.dll' 'windows1809/opengl32.dll'