Merge branch 'patch-1' into 'master'

Update book.toml

See merge request cocsn/gosdn!57

documentation/book.toml

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