Fixed a comment that referenced the wrong method

Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7100)

include/openssl/x509.h

@@ -660,7 +660,7 @@ int X509_get_signature_type(const X509 *x);
 
 /*
  * This one is only used so that a binary form can output, as in
- * i2d_X509_NAME(X509_get_X509_PUBKEY(x), &buf)
+ * i2d_X509_PUBKEY(X509_get_X509_PUBKEY(x), &buf)
  */
 X509_PUBKEY *X509_get_X509_PUBKEY(const X509 *x);
 const STACK_OF(X509_EXTENSION) *X509_get0_extensions(const X509 *x);