[openssl/openssl] 8087ec: demo: Fix makefile target

[Pauli]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 8087ecee314e15cac97b7b9eefbe9cb2ef1fae22
      https://github.com/openssl/openssl/commit/8087ecee314e15cac97b7b9eefbe9cb2ef1fae22
  Author: Pauli <pauli at openssl.org>
  Date:   2023-03-15 (Wed, 15 Mar 2023)

  Changed paths:
    M demos/encrypt/Makefile

  Log Message:
  -----------
  demo: Fix makefile target

The makefile target was incorrect and wouldn't build the rsa_encrypt demo.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>
Reviewed-by: Richard Levitte <levitte at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20503)

(cherry picked from commit 67bfdfa17bc4ca8e2b819316299bb82748394c45)