Update ci.yml

Author: carstenbauer

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         version:
           - '1.6' # remove at some point in the future, if needed.
-          - '1.10' # replace by 'lts' when this points to 1.10
+          - 'lts' # currently 1.10
           - '1' # latest stable 1.x release
           - 'pre'
         os: