chore(deps): update gateway-helm docker tag to v1.6.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
gateway-helm (source)	HelmChart	patch	1.6.0 -> 1.6.1

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Release Notes

envoyproxy/gateway (gateway-helm)

v1.6.1

Compare Source

Release Announcement

Check out the v1.6.1 release notes to learn more about the release.

v1.6.1

Compare Source

Release Announcement

Check out the v1.6.1 release notes to learn more about the release.

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Configuration

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