Match build openssl version with README

Author: cameronelliott

src/main/resources/dtls-fuzzer.properties

@@ -7,7 +7,7 @@ scandium.oldversion=2.0.0-M16
 wolfssl.oldversion=4.0.0
 piondtls.oldversion=usenix
 mbedtls.version=2.26.0
-openssl.version=1.1.1k
+openssl.version=1.1.1b
 jsse.version=16.0.1
 gnutls.version=3.7.1
 scandium.version=2.6.2