docs(contributing): Fix indentation on manifests provided as examples… #1329

Job	Run time
Lint Go	2m 17s
Check Codegen	26s
Lint TS	21s
Unit Tests	2m 47s
build-and-push / build (linux/amd64)	4m 9s
build-and-push / build (linux/arm64)	19m 56s
build-and-push / merge	11s
	30m 7s

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