ci: use Poetry 1.1.14 in installer workflow (#20)

Author: finswimmer

.github/workflows/installer.yml

@@ -30,7 +30,7 @@ jobs:
           - ""
           - "--preview"
           - "--git https://github.com/python-poetry/poetry.git"
-          - "--version 1.1.13"
+          - "--version 1.1.14"
         include:
           - os: Ubuntu
             image: ubuntu-latest