Bug#1057533: qpid-proton-j-extensions: FTBFS with default Java 21

[tony mancill]

On Fri, Feb 16, 2024 at 04:10:16PM +1300, Vladimir Petko wrote:
>  [1] 
> https://salsa.debian.org/java-team/qpid-proton-j-extensions/-/merge_requests/1

Merged and uploaded.  Thank you for patch!