chore: update german docs, fix links (#560)

* updated german links
* fixed links where `QingWei-Li` should've been `docsifyjs`
  * naturally excluded donate links and links to private projects like `vuep` unrelated to docsify

---

See commit for details. If you have a question, just ask.

packages/docsify-server-renderer/README.md

@@ -17,7 +17,7 @@ var renderer = new Renderer({
   template: readFileSync('./docs/index.template.html', 'utf-8').,
   config: {
     name: 'docsify',
-    repo: 'qingwei-li/docsify'
+    repo: 'docsifyjs/docsify'
   }
 })
 

packages/docsify-server-renderer/package.json

@@ -9,7 +9,7 @@
   },
   "homepage": "https://docsify.js.org",
   "license": "MIT",
-  "repository": "QingWei-Li/docsify",
+  "repository": "docsifyjs/docsify",
   "main": "build.js",
   "scripts": {
     "test": "echo 'hello'"