Fix `OpenSSL::X509::CRL#to_pem` when building CRL from scratch #257

Job	Run time
maven-test (jruby-9.4.12.0, 8, temurin)	2m 12s
maven-test (8, temurin, jruby-9.2.19.0)	2m 7s
maven-test (jruby-9.4.12.0, 23, temurin)	2m 12s
maven-test (jruby-9.4.12.0, 11, temurin)	2m 22s
maven-test (jruby-9.4.12.0, 21, temurin)	1m 54s
maven-test (11, temurin, jruby-9.3.13.0)	1m 53s
maven-test (11, zulu, jruby-9.4.5.0)	1m 59s
maven-test (11, temurin, jruby-9.2.20.1)	2m 32s
maven-test (17, oracle, jruby-9.4.7.0)	1m 52s
maven-test (21, oracle, jruby-9.4.8.0)	2m 3s
maven-test (21, oracle, jruby-9.3.13.0)	1m 59s
maven-test (8, temurin, jruby-9.3.3.0)	1m 59s
maven-test (24, corretto, jruby-head)	1m 57s
maven-test (21, zulu, jruby-head)	2m 13s
	29m 14s

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