fix typo config-network.yaml

[k4leung4]

fix typo

Changes

• 🐛 typo in example

/kind documentation

Fixes #

Release Note

Docs

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: k4leung4
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[knative-prow]

@k4leung4: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
unit-tests_networking_main	29b69e0	link	true	/test unit-tests
build-tests_networking_main	29b69e0	link	true	/test build-tests

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