[bugfix] added bootstrap.min.css as well to fix nonworking mobile version

added bootstrap.min.css to enable mobile version

views/DE/project/projects.pug

@@ -4,6 +4,7 @@ html(lang="de")
     title= "Project List"
     meta(charset="UTF-8")
     meta(name="viewport", content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no")
+    link(rel="stylesheet", type="text/css", href="/css/bootstrap.min.css")
     link(rel="stylesheet", type="text/css", href="/css/bootstrap.css")
     link(rel="stylesheet", href="https://use.fontawesome.com/releases/v5.8.2/css/all.css", integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay", crossorigin="anonymous")
     style.