Bump jetty.version from 12.0.10 to 12.0.12 #1415

Job	Run time
Initial JDK 17 Weld Build + WildFly patch	2m 41s
CDI TCK - JDK 17	6m 20s
CDI TCK - JDK 21	6m 27s
CDI TCK SE - JDK 17	54s
Weld Examples build and test - JDK 17}	1m 54s
CDI TCK SE - JDK 21	1m 0s
Weld In-container Tests - JDK 17	6m 27s
Weld In-container Tests - JDK 21	6m 19s
Weld Tests w/o Container - JDK 17	3m 29s
Relaxed mode testing - JDK 17	9m 54s
Weld Tests w/o Container - JDK 21	3m 27s
Weld SE-Servlet Cooperation	32s
	49m 24s

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