fix: indentation

Author: jeqo

commons/src/main/java/io/aiven/kafka/tieredstorage/commons/storage/filesystem/FileSystemStorage.java

@@ -90,7 +90,7 @@ public void delete(final String key) throws IOException {
         final Path path = fsRoot.resolve(key);
         Files.deleteIfExists(path);
         Path parent = path.getParent();
-       while (parent != null && Files.isDirectory(parent) && !parent.equals(fsRoot)
+        while (parent != null && Files.isDirectory(parent) && !parent.equals(fsRoot)
             && PathUtils.isEmptyDirectory(parent)) {
             Files.deleteIfExists(parent);
             parent = parent.getParent();