fix a stray download speed warning appearing after loading is already finished

Loader/src/main/java/de/com/baseband/launcher/Loader.java

@@ -212,6 +212,7 @@ public class Loader implements Util {
                         downloadUpdated.unlock();
                         continueDownload.waitHere();
                     }
+                    downloadUpdated.unlock();
                     LOGGER.info("BaseBand downloaded: {} chunks.", data.size());
                     classLoader = new CustomClassLoader(data);
                     classLoader.inject();