chore: bump changelog for 1.29.0 #2172

Job	Run time
integration (kong:1.4.3)	1m 20s
integration (kong:1.5.1)	2m 7s
integration (kong:2.0.5)	1m 21s
integration (kong:2.1.4)	1m 47s
integration (kong:2.2.2)	1m 43s
integration (kong:2.3.3)	1m 52s
integration (kong:2.4.1)	2m 7s
integration (kong:2.5.1)	1m 18s
integration (kong:2.6.0)	2m 20s
integration (kong:2.7)	1m 47s
integration (kong:2.8)	2m 4s
integration (kong:3.0)	1m 24s
integration (kong:3.1)	2m 3s
integration (kong:3.2)	2m 18s
integration (kong:3.3)	1m 57s
integration (kong/kong:master-alpine)	1m 44s
	29m 12s

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