bump golang.org/x/net in kurl_proxy (#4130) #1604

Job	Run time
kurl-addon-changes-filter	6s
generate-tag	7s
image-deps-updater	46s
build-kurl-proxy	54s
build-schema-migrations	1m 11s
build-web	2m 44s
generate-kots-release-notes-pr	0s
Run regression testing	5s
build-go-api	4m 30s
goreleaser	0s
release-go-api-tagged	0s
generate-kurl-addon	0s
build-airgap	0s
regression-test	0s
publish-kurl-addon	0s
validate-kurl-addon	0s
	10m 23s

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