allow CI interruption when new commit is pushed

.gitlab-ci.yml

@@ -4,6 +4,7 @@
 slides:
   stage: build
   image: blang/latex:ctanfull
+  interruptible: true
   script:
     - mkdir public
     - cd M1_biosciences_dimension_reduction
@@ -30,6 +31,7 @@ slides:
 pages:
   stage: deploy
   image: rocker/tidyverse
+  interruptible: true
   script:
     - apt update
     - apt install -y libglpk-dev