correct spelling errors detected by Debian lintian

CLA: trivial

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5801)
diff --git a/CHANGES b/CHANGES
index 00b5c40..a13183f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -65,7 +65,7 @@
      below. Similarly TLSv1.2 ciphersuites are not compatible with TLSv1.3.
      In order to avoid issues where legacy TLSv1.2 ciphersuite configuration
      would otherwise inadvertently disable all TLSv1.3 ciphersuites the
-     configuraton has been separated out. See the ciphers man page or the
+     configuration has been separated out. See the ciphers man page or the
      SSL_CTX_set_ciphersuites() man page for more information.
      [Matt Caswell]