Update book.toml

documentation/book.toml

 [book]
-authors = []
+authors = [Martin Stiemerling, Manuel Kieweg, Malte Bauch]
 language = "en"
 multilingual = false
-src = "documentation"
+src = "."
 
 [output.html]
 git-repository-url = "https://code.fbi.h-da.de/cocsn/gosdn"
 git-repository-icon = "fa-gitlab"
-site-url = "/example-book/"
+site-url = "/public/"
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