Add Go 1.23 to the list of mirrors #3685

Job	Run time
integration (v1.29.8, v0.56.8)	28m 46s
integration (v1.29.8, v0.65.1)	29m 10s
integration (v1.31.0, v0.56.8)	29m 23s
integration (v1.31.0, v0.65.1)	28m 42s
unit	3m 30s
e2e (v1.29.8, v0.56.8)	37m 0s
e2e (v1.29.8, v0.65.1)	36m 2s
e2e (v1.31.0, v0.56.8)	34m 59s
e2e (v1.31.0, v0.65.1)	39m 17s
test-docker-build (base)	37s
test-docker-build (git)	1m 0s
test-docker-build (image-processing)	33s
test-docker-build (waiter)	38s
	4h 29m 37s

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