pkgdown 2.1.1

• Added keyboard shortcut, /, to focus search bar (#2423)
• The BugReports field can now be an email (@catalamarti, #2275).
• New clean_cache() function removes the contents of the cache directory (#2718).
• pkgdown now depends on R >= 4.0.0 (#2714)
• Updated GitHub Actions advice and workflows around Quarto install (@tanho63, #2743)