[FLINK-22706][legal] Update NOTICE regarding docs/ contents

Author: FuyaoLi2017

NOTICE

@@ -7,17 +7,12 @@ The Apache Software Foundation (http://www.apache.org/).
 This project bundles the following dependencies under the MIT license.
 See bundled license files for details.
 
-- jQuery v3.5.1 | (c) JS Foundation and other contributors
-	-> in "docs/page/js/jquery.min.js"
 - AnchorJS v3.1.0 (https://github.com/bryanbraun/anchorjs) Copyright (c) 2016 Bryan Braun
-    -> in "docs/page/js/anchor.min.js"
-- Bootstrap v3.3.4 (http://getbootstrap.com) Copyright 2011-2015 Twitter, Inc.
-    -> css in "docs/page/css/bootstrap.min.css"
-    -> js in "docs/page/js/bootstrap.min.js"
-    -> fonts in "docs/page/fonts"
-
-Note: The "docs/page/fonts/glyphicons-halflings*" fonts are included in Bootstrap, and licensed under the same license as Boostrap.
-See https://glyphicons.com/old/license.html#old-halflings-bootstrap for more information.
+    -> in "docs/static/js/anchor.min.js"
+- font-awesome:4.6.3 (css) (https://fontawesome.com/) - Created by Dave Gandy
+    -> css in "docs/static/font-awesome/css"
+- chroma (css generated by Hugo) (https://github.com/alecthomas/chroma) Copyright (C) 2017 Alec Thomas
+    -> in "docs/assets/github.css"
 
 This project bundles the following dependencies under the BSD license.
 See bundled license files for details.
@@ -28,8 +23,8 @@ See bundled license files for details.
 This project bundles the following dependencies under SIL OFL 1.1 license (https://opensource.org/licenses/OFL-1.1).
 See bundled license files for details.
 
-- font-awesome:4.5.0 (Font) (http://fortawesome.github.io/Font-Awesome/) - Created by Dave Gandy
-    -> fonts in "docs/page/font-awesome/fonts"
+- font-awesome:4.6.3 (Font) (https://fontawesome.com/) - Created by Dave Gandy
+    -> fonts in "docs/static/font-awesome/fonts"
 
 The Apache Flink project contains or reuses code that is licensed under the ISC license from the following projects.