use quotes

Author: ocefpaf

.github/workflows/deploy-docs.yml

@@ -32,7 +32,7 @@ jobs:
         run: >
           set -e
           && pip install jupyter-book
-          && jupyter-book build jupyter-book<2
+          && jupyter-book build "jupyter-book<2"
 
       - name: GitHub Pages action
         if: success() && github.event_name == 'release'

.github/workflows/docs-linkchecker.yml

@@ -26,5 +26,5 @@ jobs:
       - name: Linkcheck
         run: >
           set -e
-          && pip install jupyter-book<2
+          && pip install "jupyter-book<2"
           && jupyter-book build jupyterbook --builder linkcheck