[ruby/openssl] test/openssl/test_ssl: use TLS 1.2 for finished_messages on LibreSSL

LibreSSL 2.2.x has a bug in the Finished message handling with TLS 1.3.
This is fixed by LibreSSL 3.3.2.

https://github.com/ruby/openssl/commit/0bea59d245

test/openssl/test_ssl.rb

@@ -526,6 +526,7 @@ class OpenSSL::TestSSL < OpenSSL::SSLTestCase
     }) { |port|
       ctx = OpenSSL::SSL::SSLContext.new
       ctx.verify_mode = OpenSSL::SSL::VERIFY_NONE
+      ctx.max_version = :TLS1_2 if libressl?(3, 2, 0) && !libressl?(3, 3, 0)
       server_connect(port, ctx) { |ssl|
         ssl.puts "abc"; ssl.gets