Bump golang.org/x/net from 0.21.0 to 0.23.0 in /exporter #9

Job	Run time
govulncheck	1m 2s
setup-environment	38s
checks	47s
lint	2m 4s
cross-build-collector (darwin, amd64)	13s
test-coverage	1m 47s
cross-build-collector (darwin, arm64)	11s
unittest-matrix (~1.22)	1m 36s
cross-build-collector (linux, 386)	13s
unittest-matrix (~1.21.5)	1m 37s
cross-build-collector (linux, amd64)	11s
cross-build-collector (linux, arm64)	11s
cross-build-collector (linux, ppc64le)	12s
cross-build-collector (linux, arm, 7)	19s
cross-build-collector (linux, s390x)	10s
cross-build-collector (windows, 386)	14s
cross-build-collector (windows, amd64)	13s
unittest	1s
	11m 39s

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