update x/net dependency #80

Job	Run time
End-to-End test with kured with code and manifests from HEAD (command) (1.27)	3m 35s
End-to-End test with kured with code and manifests from HEAD (concurrent) (1.27)	3m 18s
Check docs for incorrect links	5s
End-to-End test with kured with code and manifests from HEAD (command) (1.28)	3m 36s
End-to-End test with kured with code and manifests from HEAD (concurrent) (1.28)	3m 23s
End-to-End test with kured with code and manifests from HEAD (command) (1.29)	2m 26s
End-to-End test with kured with code and manifests from HEAD (signal) (1.27)	3m 19s
End-to-End test with kured with code and manifests from HEAD (concurrent) (1.29)	2m 36s
End-to-End test with kured with code and manifests from HEAD (signal) (1.28)	3m 6s
Run go tests	1m 9s
End-to-End test with kured with code and manifests from HEAD (signal) (1.29)	2m 32s
Lint golang code	12s
Lint bash code with shellcheck	6s
Build image and scan it against known vulnerabilities	1m 30s
	30m 53s

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