fix: update to flake.nix

.config/chglog/CHANGELOG.tpl.md

.config/chglog/config.yml

.envrc

.gitignore

.gitlab-ci.yml

.gitlab/issue_templates/rfc.md

.gitlab/issue_templates/thoughts-and-ideas.md

Taskfile.yml

devenv.nix

devenv.yaml

documentation/licenses/github.com/fsnotify/fsnotify/LICENSE

documentation/licenses/golang.org/x/sys/unix/LICENSE

documentation/manual/de/book.toml

documentation/manual/de/book/.nojekyll

documentation/manual/de/book/01-Einleitung.html

documentation/manual/de/book/02-Erste-Schritte.html

documentation/manual/de/book/404.html

documentation/manual/de/book/CNAME

...mentation/manual/de/book/FontAwesome/css/font-awesome.css

...entation/manual/de/book/FontAwesome/fonts/FontAwesome.ttf