book.toml: Add redirect for "About this Handbook" section.

flexibeast · flexibeast · commit 4c9ee716bf4c · 2020-08-23T13:20:06.000+10:00
diff --git a/book.toml b/book.toml
@@ -7,6 +7,9 @@ title = "Void Linux Handbook"
 [output.html]
 theme = "src/theme"
 
+[output.html.redirect]
+"/about-this-handbook.html" = "/about/about-this-handbook.html"
+
 [output.latex]
 optional = true
 
