Docs: Update remaining HTTP URLs to HTTPS

Update a few remaining HTTP URLs to HTTPS. The only ones left are XMLNS-like
URLs or ones to localhost - those need to stay as-is.

Closes gh-5479

README.md

@@ -211,7 +211,7 @@ npm start
 
 Run the unit tests with a local server that supports PHP. Ensure that you run the site from the root directory, not the "test" directory. No database is required. Pre-configured php local servers are available for Windows and Mac. Here are some options:
 
-- Windows: [WAMP download](http://www.wampserver.com/en/)
+- Windows: [WAMP download](https://www.wampserver.com/en/)
 - Mac: [MAMP download](https://www.mamp.info/en/downloads/)
 - Linux: [Setting up LAMP](https://www.linux.com/training-tutorials/easy-lamp-server-installation/)
 - [Mongoose (most platforms)](https://code.google.com/p/mongoose/)

build/fixtures/README.md

@@ -98,7 +98,7 @@ You can also use jQuery from npm even in the browser setup. Read along for more
 
 ### Using jQuery from npm
 
-There are several ways to use jQuery from npm. One is to use a build tool like [Webpack](https://webpack.js.org/), [Browserify](http://browserify.org/) or [Babel](https://babeljs.io/). For more information on using these tools, please refer to the corresponding project's documentation.
+There are several ways to use jQuery from npm. One is to use a build tool like [Webpack](https://webpack.js.org/), [Browserify](https://browserify.org/) or [Babel](https://babeljs.io/). For more information on using these tools, please refer to the corresponding project's documentation.
 
 Another way is to use jQuery directly in Node.js. See the [Node.js pre-requisites](#nodejs-pre-requisites) section for more details on the Node.js-specific part of this.