chore(deps): update dependency @urql/exchange-graphcache to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@urql/exchange-graphcache (source)	^5.2.0 || ^6.0.0 || ^7.0.0 -> ^5.2.0 || ^6.0.0 || ^7.0.0 || ^8.0.0

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Release Notes

urql-graphql/urql (@​urql/exchange-graphcache)

v8.1.0

Minor Changes

• Add possibleTypes config for deterministic fragment matching
  Submitted by @​xuanduc987 (See #​3805)

v8.0.0

Patch Changes

• Updated dependencies (See #​3789 and #​3807)
  • @​urql/core@​6.0.0

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