OZG-7573 OZG-7991 Fix spelling

ozgcloud-common-lib/src/main/java/de/ozgcloud/common/binaryfile/StreamingFileSender.java

@@ -86,7 +86,7 @@ public abstract class StreamingFileSender<Q, S> {
 
 	void sendNext() {
 		if (!done.get()) {
-			waitForOberver();
+			waitForObserver();
 			sendMetaData();
 			do {
 				LOG.debug("Sending next chunk.");
@@ -100,7 +100,7 @@ public abstract class StreamingFileSender<Q, S> {
 		return getRequestObserver().isReady();
 	}
 
-	private void waitForOberver() {
+	private void waitForObserver() {
 		synchronized (this) {
 			while (Objects.isNull(getRequestObserver())) {
 				try {