fix option

Author: abbbi

Changelog

@@ -1,7 +1,7 @@
 Version 2.24
 ---------
  * virnbdbackup:
-  - Add option --no-sparse-detect (#263): The feature implemented as
+  - Add option --no-sparse-detection (#263): The feature implemented as
   with version 2.21 requires to query the complete base:allocation
   bitmap during incremental backup.
 

README.md

@@ -1237,7 +1237,7 @@ disk images during incremental backup.
 Depending on your hardware and the size of the virtual disks, the operation to
 query the complete allocation bitmap during incremental backup, may take longer
 than to backup the complete changeset. Therefore, you can disable the detection
-of sparse/fstrimmed blocks using the `--no-sparse-detect` option.
+of sparse/fstrimmed blocks using the `--no-sparse-detection` option.
 
 
 ## Test your backups!