Update index.html window-placement to window-management (#24)

* Update index.html window-placement to window-management

Intended to update respec references to legacy "Multi-Screen Window Placement" and "https://www.w3.org/TR/window-placement/" to the modern "Window Management" and "https://www.w3.org/TR/window-management/"

* Update index.html

Attempt to fix [=policy-controlled feature/default allowlist=] refs

index.html

@@ -92,14 +92,14 @@ <h2>
             <li>The string that identifies the policy controlled feature (e.g., `"super-awesome"`).
             Make sure the string is linkable by wrapping it a [^dfn^] element.
             </li>
-            <li>The [=default allowlist=] value (e.g. `'self'`).
+            <li>The [=policy-controlled feature/default allowlist=] value (e.g. `'self'`).
               <aside class="example" title="Specifying a Permissions Policy">
                 <p>
                   An typical example that would meet this criteria:
                 </p>
                 <blockquote>
                   The Super Awesome API defines a [=policy-controlled feature=] identified by the
-                  string "super-awesome". Its [=default allowlist=] is `'self'`.
+                  string "super-awesome". Its [=policy-controlled feature/default allowlist=] is `'self'`.
                 </blockquote>
               </aside>
             </li>
@@ -373,7 +373,7 @@ <h2>
             NO
           </td>
         </tr>
-        <tr data-cite="window-placement">
+        <tr data-cite="window-management">
           <td class="string-token">
             "[=window-management=]"
           </td>
@@ -384,7 +384,7 @@ <h2>
             YES
           </td>
           <td class="spec">
-            [[[window-placement]]]
+            [[[window-management]]]
           </td>
           <td class="imp-chromium">
             YES