Prefer HTTPS when linking to GitHub Pages

This commit was generated using the following commands:

```
find . -iname "*.webidl" -type f -print0 | xargs -0 sed -i '' 's/http:\(.*\)github.io/https:\1github.io/g'
```

```
find . -iname "*.rs" -type f -print0 | xargs -0 sed -i '' 's/http:\(.*\)github.io/https:\1github.io/g'
```

components/script/dom/webidls/Console.webidl

@@ -5,7 +5,7 @@
  *
  * References:
  *   MDN Docs - https://developer.mozilla.org/en-US/docs/Web/API/console
- *   Draft Spec - http://sideshowbarker.github.io/console-spec/
+ *   Draft Spec - https://sideshowbarker.github.io/console-spec/
  *
  * © Copyright 2014 Mozilla Foundation.
  */

components/script/dom/webidls/TestBindingProxy.webidl

@@ -4,7 +4,7 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  * This IDL file was created to test the special operations (see
- * http://heycam.github.io/webidl/#idl-special-operations) without converting
+ * https://heycam.github.io/webidl/#idl-special-operations) without converting
  * TestBinding.webidl into a proxy.
  *
  */

components/script/dom/webidls/Window.webidl

@@ -149,7 +149,7 @@ interface WindowLocalStorage {
 };
 Window implements WindowLocalStorage;
 
-// http://w3c.github.io/animation-timing/#Window-interface-extensions
+// https://w3c.github.io/animation-timing/#Window-interface-extensions
 partial interface Window {
   long requestAnimationFrame(FrameRequestCallback callback);
   void cancelAnimationFrame(long handle);