fix(deps): update dependency @graphql-tools/utils to v8.6.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@graphql-tools/utils	8.6.6 -> 8.6.9

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Release Notes

ardatan/graphql-tools

v8.6.9

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Patch Changes

• 31a33e2: pruneSchema will no longer removed used input object type.

v8.6.8

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Patch Changes

• cb23887: pruneSchema will now prune unused implementations of interfaces

v8.6.7

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Patch Changes

• 0bbb176: Refine generic typings using extends X when appropriate

  Typescript 4.7 has stricter requirements around generics
  which is explained well in the related PR:
  Make the unconstrained type parameter and {} assignability rule not apply under strictNullChecks microsoft/TypeScript#48366

  These changes resolve the errors that these packages will
  face when attempting to upgrade to TS 4.7 (still in beta
  at the time of writing this). Landing these changes now
  will allow other TS libraries which depend on these
  packages to experiment with TS 4.7 in the meantime.

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