theme: upgrade to latest v4.9-dev

config/_default/params.toml

@@ -152,6 +152,10 @@ docs_section_pager = true  # Display pager in Docs layout (e.g. tutorials)?
 # Enable in-built social sharing buttons? (true/false)
 sharing = true
 
+# Show a copyright license from creativecommons.org in the site footer?
+# Page specific copyright licenses are also possible by adding this option to a page's front matter.
+copyright_license = {enable = false, allow_derivatives = false, share_alike = true, allow_commercial = false, notice = "This work is licensed under {license}"}
+
 # Link authors to their profile page? (true/false)
 link_authors = true