Merge remote-tracking branch 'origin/main' into jb2

# Conflicts:
#	.github/workflows/ci.yml

Author: mmcky

.github/workflows/publish.yml

@@ -72,7 +72,7 @@ jobs:
         run: pip list
       # Download Build Cache from cache.yml
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v21
+        uses: dawidd6/action-download-artifact@v23
         with:
           workflow: cache.yml
           branch: main

environment.yml

@@ -7,7 +7,7 @@ dependencies:
   - pip
   - pip:
     - jupyter-book>=1.0.4post1,<2.0
-    - quantecon-book-theme==0.21.0
+    - quantecon-book-theme==0.22.0
     - sphinx-tojupyter==0.6.0
     - sphinxext-rediraffe==0.3.0
     - sphinx-exercise==1.2.1