Disable Furo fancy scroll behavior

Author: asmeurer

Diff for: docs/_static/custom.css

@@ -4,3 +4,9 @@ body {
     -webkit-font-smoothing: auto;
     -moz-osx-font-smoothing: auto;
 }
+
+/* Disable the fancy scrolling behavior when jumping to headers (this is too
+   slow for long pages) */
+html {
+    scroll-behavior: auto;
+}