Refactor GitHub Actions workflow to improve readability by adding a multi-line run command for mike deploy and set-default

Author: MariusStorhaug

.github/workflows/pages.yml

@@ -36,4 +36,6 @@ jobs:
 
       - run: pip install mkdocs mkdocs-material mike
 
-      - run: mike deploy --push --update-aliases 0.1 latest
+      - run: |
+          mike deploy --push --update-aliases 0.1 latest
+          mike set-default --push latest