fixed broken links in documentation

docs/api/loaders/ImageLoader.html

@@ -14,7 +14,7 @@
 		<h2>Constructor</h2>
 
 
-		<h3>[name]([page:LoadingManager manager)</h3>
+		<h3>[name]([page:LoadingManager manager])</h3>
         <div>
         manager -- The [page:LoadingManager loadingManager] for the loader to use. Default is [page:LoadingManager THREE.DefaultLoadingManager].
         </div>

docs/api/loaders/MaterialLoader.html

@@ -14,7 +14,7 @@
 		<h2>Constructor</h2>
 
 
-		<h3>[name]([page:LoadingManager manager)</h3>
+		<h3>[name]([page:LoadingManager manager])</h3>
         <div>
         manager -- The [page:LoadingManager loadingManager] for the loader to use. Default is [page:LoadingManager THREE.DefaultLoadingManager].
         </div>