Fix typos prior to release

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/library/lmots.h b/library/lmots.h
index 39e8699..022dcf3 100644
--- a/library/lmots.h
+++ b/library/lmots.h
@@ -139,7 +139,7 @@
  *                           this public key.
  *
  * \param ctx                The initialized LMOTS context that contains the
- *                           publc key.
+ *                           public key.
  * \param key                The buffer into which the key will be output. Must
  *                           be at least #MBEDTLS_LMOTS_PUBLIC_KEY_LEN in size.
  *