bump golang.org/x/net to address CVE

[hzxuzhonghu]

What type of PR is this?

/kind security

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #1194

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[kmesh-bot]

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[hzxuzhonghu]

@LiZhenCheng9527 Can you add /lgtm

[LiZhenCheng9527]

/lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.20%. Comparing base (328497d) to head (0a166ed).
Report is 20 commits behind head on release-1.0.

see 4 files with indirect coverage changes

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