chore(deps): update gsoci.azurecr.io/giantswarm/shield-schema-gen docker tag to v0.0.7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
gsoci.azurecr.io/giantswarm/shield-schema-gen	docker	patch	0.0.6 → 0.0.7

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Release Notes

giantswarm/shield-tools (gsoci.azurecr.io/giantswarm/shield-schema-gen)

v0.0.7

Compare Source

Added

• schema-gen: --normalize flag to skip the schemalint normalize and verify
  steps. On by default, matching the format charts commit.

Fixed

• schema-gen: replace additionalProperties: false with
  unevaluatedProperties: false on objects that also carry a $ref. The
  generator's output otherwise rejects every value defined by the referenced
  schema.

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