Merge pull request #13536 from bartvde/fix-typo-docs

Fix small typo in docs

src/ol/PluggableMap.js

@@ -547,7 +547,7 @@ class PluggableMap extends BaseObject {
 
   /**
    * Add the given interaction to the map. If you want to add an interaction
-   * at another point of the collection use `getInteraction()` and the methods
+   * at another point of the collection use `getInteractions()` and the methods
    * available on {@link module:ol/Collection~Collection}. This can be used to
    * stop the event propagation from the handleEvent function. The interactions
    * get to handle the events in the reverse order of this collection.