update mappings per issue 147

closes #147

Author: scottaohara

index.html

@@ -1026,6 +1026,9 @@ HTML Element Role Mappings
                 <div class="role">
                   <span class="type">Role:span> `ATK_ROLE_PANEL`
                 div>
+                <div class="relations">
+                  <span class="type">Relations:span> `ATK_RELATION_DETAILS_FOR`
+                div>
               td>
               <td class="ax">
                 <div class="role">
@@ -3292,6 +3295,9 @@ HTML Element Role Mappings
                 <div class="role">
                   <span class="type">Role:span> `ROLE_TOGGLE_BUTTON`
                 div>
+                <div class="relations">
+                  <span class="type">Relations:span> `ATK_RELATION_DETAILS`
+                div>
               td>
               <td class="ax">
                 <div class="role">
@@ -6295,7 +6301,7 @@ Change Log
         <section>
           <h4>Substantive changes since moving entirely to the Web Application Working Group (formerly Web Platform WG) (01-Oct-2016)h4>
           <ul>
-            <li>22-July-2019: Update ATK mapping for `summary` element. See <a href="https://github.com/w3c/html-aam/issues/142">GitHub issue #142a>.li>
+            <li>23-August-2019: Update ATK mappings for `summary` and `details` elements. See <a href="https://github.com/w3c/html-aam/issues/142">GitHub issue #142a> and <a href="https://github.com/w3c/html-aam/issues/147">GitHub issue #147a>.li>
             <li>10-July-2019: Further updated mappings for `ins` and `del` elements. See <a href="https://github.com/w3c/html-aam/pull/219">GitHub pull request #219a>.li>
             <li>13-June-2019: Update mappings for `ins` and `del` elements. See <a href="https://github.com/w3c/html-aam/issues/141">GitHub issue #141a>.li>
             <li>10-June-2019: Update ATK mappings for `header` and `footer` when not scoped to the `body`. See <a href="https://github.com/w3c/html-aam/issues/129">GitHub issue #129a>.li>