Bump go.uber.org/zap from 1.24.0 to 1.26.0 in /exporter/otlphttpexporter #578

Job	Run time
setup-environment	48s
checks	35s
lint	2m 3s
test-coverage	1m 36s
cross-build-collector (darwin, amd64)	14s
unittest (1.20)	1m 56s
cross-build-collector (darwin, arm64)	11s
unittest (1.19)	2m 5s
cross-build-collector (linux, 386)	18s
cross-build-collector (linux, amd64)	25s
cross-build-collector (linux, arm64)	15s
cross-build-collector (linux, ppc64le)	12s
cross-build-collector (linux, arm)	15s
cross-build-collector (windows, 386)	22s
cross-build-collector (windows, amd64)	8s
	11m 23s

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