Fix a typo in scrypt docs

Change-Id: I1ee06c37a2f6b2029bef0cb94543d8a56afb6dcb
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/71907
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
diff --git a/include/openssl/evp.h b/include/openssl/evp.h
index 43180f2..2df8513 100644
--- a/include/openssl/evp.h
+++ b/include/openssl/evp.h
@@ -495,7 +495,7 @@
 // as described below.
 //
 // |N|, |r|, and |p| are as described in RFC 7914 section 6. They determine the
-// cost of the operation. If |max_mem| is zero, a defult limit of 32MiB will be
+// cost of the operation. If |max_mem| is zero, a default limit of 32MiB will be
 // used.
 //
 // The parameters are considered invalid under any of the following conditions: