Fix spelling and typographical errors found by cspell
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/include/mbedtls/chachapoly.h b/include/mbedtls/chachapoly.h
index c4ec7b5..ed568bc 100644
--- a/include/mbedtls/chachapoly.h
+++ b/include/mbedtls/chachapoly.h
@@ -161,7 +161,7 @@
* \param ctx The ChaCha20-Poly1305 context. This must be initialized
* and bound to a key.
* \param nonce The nonce/IV to use for the message.
- * This must be a redable buffer of length \c 12 Bytes.
+ * This must be a readable buffer of length \c 12 Bytes.
* \param mode The operation to perform: #MBEDTLS_CHACHAPOLY_ENCRYPT or
* #MBEDTLS_CHACHAPOLY_DECRYPT (discouraged, see warning).
*