math/jacop: fix building in jdk11 and jdk17

Error fixed:
SimpleArrayList.java:187: error: tag not supported in HTML5: tt
[00:01:31] [ERROR] * Returns <tt>true</tt> if this list contains the specified element.

It does not build on jdk21.
Error on jdk21:
[00:00:43] [INFO] Compiling 30 source files to /wrkdirs/usr/ports/math/jacop/work/jacop-4.8.0/target/classes at 1765635688496
[00:00:44] [ERROR] error:
[00:00:44] [INFO] bad constant pool index: 0 at pos: 48454
[00:00:44] [INFO] while compiling: <no file>
[00:00:44] [INFO] during phase: globalPhase=<no phase>, enteringPhase=<some phase>

PR: 291629
Approved-by: maintainer timeout