Update sbt, scripted-plugin to 1.11.6 in 0.11.x #2840

Job	Run time
conformance	4m 19s
build (2_12, mima)	1m 34s
build (2_12, e2e)	3m 23s
build (3, mima)	6s
build (2_13, test)	11m 13s
build (2_13, e2e)	4m 4s
build (2_12, test)	10m 55s
build (2_13, mima)	1m 21s
build (3, e2e)	4m 15s
build (3, test)	9m 13s
build (3, scala3_compat_test)	11m 10s
build (2_12, examples_and_formatting)	3m 1s
build (2_13, scala3_compat_test)	9m 43s
ci-passed	3s
	1h 14m 20s

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