docs: update theme 1.8.3

Author: dgarcia360

.github/dependabot.yml

@@ -4,8 +4,6 @@ updates:
     directory: "/docs"
     schedule:
       interval: "daily"
-    ignore:
-      - dependency-name: "*"
     allow:
       - dependency-name: "sphinx-scylladb-theme"
       - dependency-name: "sphinx-multiversion-scylla"