Fix typo regarding disk warning thresholds

Co-authored-by: Michał Krassowski <[email protected]>

README.md

@@ -147,7 +147,7 @@ c.ResourceUseDisplay.track_disk_usage = True
 
 The values are from the partition containing the folder in the trait `disk_path` (which defaults to `/home/joyvan`)
 
-Mirroring CPU and Memory, the trait `disk_warning_threshold` signifies when to flag a usage warning, and like the others, it defaults to `0.1` (10% remailing)
+Mirroring CPU and Memory, the trait `disk_warning_threshold` signifies when to flag a usage warning, and like the others, it defaults to `0.1` (10% remaining)
 
 ![Screenshot with Disk, CPU, and memory](./doc/statusbar_disk.png)