QmlProjectManager: Fix spelling

Change-Id: Ia03bb14c7e19090fa71ebf35597539a254bcb308
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/qmlprojectmanager/fileformat/qmlprojectfileformat.cpp

@@ -118,7 +118,7 @@ QmlProjectItem *QmlProjectFileFormat::parseProjectFile(const QString &fileName,
                 setupFileFilterItem(cssFileFilterItem, childNode);
                 projectItem->appendContent(cssFileFilterItem);
             } else {
-                qWarning() << "Unkwown type:" << childNode->name();
+                qWarning() << "Unknown type:" << childNode->name();
             }
         }
         return projectItem;