Disallow invalid inline style comments in stylesheets (#9099)

res/css/views/dialogs/_ManageRestrictedJoinRuleDialog.pcss

@@ -31,7 +31,7 @@ limitations under the License.
     height: 60vh;
 
     .mx_SearchBox {
-        // To match the space around the title
+        /* To match the space around the title */
         margin: 0 0 15px 0;
         flex-grow: 0;
     }
@@ -119,7 +119,7 @@ limitations under the License.
             content: '';
             position: absolute;
             left: 10px;
-            top: calc(50% - 8px); // vertical centering
+            top: calc(50% - 8px); /* vertical centering */
             height: 16px;
             width: 16px;
             background-color: $secondary-content;