Bump golang.org/x/net from 0.21.0 to 0.23.0 in /receiver/splunkhecreceiver #15588

Job	Run time
govulncheck (receiver-0)	1m 38s
setup-environment	0s
govulncheck (receiver-1)	1m 38s
govulncheck (receiver-2)	1m 52s
govulncheck (receiver-3)	1m 45s
govulncheck (processor)	1m 38s
govulncheck (exporter-0)	1m 39s
govulncheck (exporter-1)	1m 38s
govulncheck (extension)	1m 43s
govulncheck (connector)	1m 39s
govulncheck (internal)	1m 37s
govulncheck (pkg)	1m 37s
govulncheck (cmd-0)	1m 31s
govulncheck (cmd-1)	1m 38s
check-codeowners	0s
check-collector-module-version	0s
lint-matrix	0s
checks	0s
unittest-matrix	0s
build-examples	0s
correctness-metrics	0s
correctness-traces	0s
cross-compile	0s
integration-tests-matrix	0s
lint	0s
unittest	0s
build-package	0s
integration-tests	0s
windows-msi	0s
coverage	0s
publish-check	0s
publish-dev	0s
publish-stable	0s
rotate-milestone	0s
	21m 33s

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