travis-ci: bumped OpenSSL to 1.1.1k.

Author: xiaocang

.travis.yml

@@ -43,7 +43,7 @@ env:
  matrix:
  - NGINX_VERSION=1.19.9 OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
  - NGINX_VERSION=1.19.9 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
- - NGINX_VERSION=1.19.9 OPENSSL_VER=1.1.1g OPENSSL_PATCH_VER=1.1.1f
+ - NGINX_VERSION=1.19.9 OPENSSL_VER=1.1.1k OPENSSL_PATCH_VER=1.1.1f
 
 services:
  - memcache