ci: pin to quarto v1.2.475

Author: machow

.github/workflows/ci.yml

@@ -83,6 +83,8 @@ jobs:
           python -m pip install shiny shinylive
           python -m pip install --no-deps dascore==0.0.8
       - uses: quarto-dev/quarto-actions/setup@v2
+        with:
+          version: "1.2.475"
       - name: Build docs
         run: |
           make docs-build