Correct NEWS entry about required security level for old versions of TLS, DTLS and SSL

The entry was incorrect because suites using RSA key exchange without SHA1
were permitted at security level 1.

Partial fix for #18194

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/18234)

(cherry picked from commit 3226a37a4875567f2bf49aa44a727bcb67bb7dcd)
diff --git a/NEWS.md b/NEWS.md
index 630c57a..6f741ee 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -122,7 +122,8 @@
     RC4, RC5 and SEED cipher functions have been deprecated.
   * All of the low-level DH, DSA, ECDH, ECDSA and RSA public key functions
     have been deprecated.
-  * SSL 3, TLS 1.0, TLS 1.1, and DTLS 1.0 only work at security level 0.
+  * SSL 3, TLS 1.0, TLS 1.1, and DTLS 1.0 only work at security level 0,
+    except when RSA key exchange without SHA1 is used.
   * Added providers, a new pluggability concept that will replace the
     ENGINE API and ENGINE implementations.