Bump go.opentelemetry.io/otel/trace from 1.19.0 to 1.20.0 in /extension/zpagesextension #791

Job	Run time
govulncheck	2m 8s
setup-environment	35s
checks	25s
test-coverage	1m 25s
lint	2m 34s
unittest-matrix (~1.21.3)	1m 44s
unittest-matrix (~1.20.10)	1m 27s
cross-build-collector (darwin, amd64)	18s
cross-build-collector (darwin, arm64)	14s
cross-build-collector (linux, 386)	8s
cross-build-collector (linux, amd64)	21s
cross-build-collector (linux, arm64)	13s
cross-build-collector (linux, ppc64le)	24s
cross-build-collector (linux, arm, 7)	12s
cross-build-collector (linux, s390x)	13s
cross-build-collector (windows, 386)	16s
cross-build-collector (windows, amd64)	22s
unittest	1s
	13m 0s

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