chore: Changelog updates for 0.16.0 #1375

Job	Run time
yamllint	4s
yamllint	4s
Build tailing sidecar operator	1m 29s
Build tailing sidecar operator	1m 29s
markdownlint	38s
markdownlint	38s
Test Helm chart (fluentbit)	3m 46s
Test Helm chart (fluentbit)	3m 46s
Test Helm chart with cert-manager (fluentbit)	3m 58s
Test Helm chart with cert-manager (fluentbit)	3m 58s
Test Helm chart with custom configuration (fluentbit)	4m 33s
Test Helm chart with custom configuration (fluentbit)	4m 56s
Test resources created without Helm chart (fluentbit)	4m 48s
Test resources created without Helm chart (fluentbit)	4m 48s
	38m 55s

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