docs: Fix some misspelling
Signed-off-by: iysheng <iyysheng@gmail.com>
diff --git a/docs/design.md b/docs/design.md
index 2af0432..25362ef 100644
--- a/docs/design.md
+++ b/docs/design.md
@@ -438,7 +438,7 @@
either decreasing this size, to limit RAM usage, or to increase it in devices
that have massive amounts of Flash or very small sized sectors and thus require
a bigger configuration to allow for the handling of all slot's sectors.
-The factor of min-write-sz is due to the behavior of flash hardware. The factor
+The factor of min-write-size is due to the behavior of flash hardware. The factor
of 3 is explained below.
2. Encryption keys: key-encrypting keys (KEKs). These keys are needed for