docs(book): fixed incorrect edit URL template

Signed-off-by: k4yt3x <i@k4yt3x.com>

Author: k4yt3x

docs/book/book.toml

@@ -8,4 +8,4 @@ title = "Video2X Documentations"
 default-theme = "ayu"
 preferred-dark-theme = "ayu"
 git-repository-url = "https://github.com/k4yt3x/video2x"
-edit-url-template = "https://github.com/k4yt3x/video2x/edit/master/docs/guide/{path}"
+edit-url-template = "https://github.com/k4yt3x/video2x/edit/master/docs/book/{path}"