more proposal updates

Author: vr4manta

docs/proposal/20241003-data-disk-support.md

@@ -59,7 +59,7 @@ Cluster administrators are asking for the ability to add additional data disks t
 
 ### Non-Goals/Future Work
 
-* Add abiltiy to advance configure additions disks, such as, define controller type (IDE, scsi, etc) or unit number in the controller.
+* Add ability to advance configure additions disks, such as, define controller type (IDE, scsi, etc) or unit number in the controller.
 * Any disk management features such as encryption.
 
 ## Proposal