[PATCH] rust: block: fix comment referring to states by wrong labels

[Hsiu Che Yu <yu.whisper.personal@gmail.com>]

The comment in `Request` describing the four ownership states referred
to states 2 and 3 as "B" and "C", which are inconsistent with the
numbering scheme used throughout the same comment block.

Update the labels to use "2" and "3" to match the existing numbered list.

Fixes: a307bf1db5448 ("rust: block: convert `block::mq` to use `Refcount`")
Signed-off-by: Hsiu Che Yu <yu.whisper.personal@gmail.com>
---
 rust/kernel/block/mq/request.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs
index ce3e30c81cb5..75d3fdf896e0 100644
--- a/rust/kernel/block/mq/request.rs
+++ b/rust/kernel/block/mq/request.rs
@@ -39,7 +39,7 @@
 /// back ownership to the block layer.
 ///
 /// Note that the driver can still obtain new `ARef` even if there is no `ARef`s in existence by
-/// using `tag_to_rq`, hence the need to distinguish B and C.
+/// using `tag_to_rq`, hence the need to distinguish 2 and 3.
 ///
 /// The states are tracked through the private `refcount` field of
 /// `RequestDataWrapper`. This structure lives in the private data area of the C

---
base-commit: b4e07588e743c989499ca24d49e752c074924a9a
change-id: 20260428-fix-docs-mq-req-d2a0fe1b6471

Best regards,
--  
Hsiu Che Yu <yu.whisper.personal@gmail.com>