Update dependency @octokit/graphql to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@octokit/graphql	7.0.2 -> 8.0.1

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Release Notes

octokit/graphql.js (@​octokit/graphql)

v8.0.1

Compare Source

Bug Fixes

• pkg: add main entry point (#​551) (d3ada54), closes octokit/core.js#662

v8.0.0

Compare Source

Features

• package is now ESM (#​549) (8b126b5)

BREAKING CHANGES

• this package is now ESM

• fix: add missing file extension in relative file path import

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Latest commit: cac0919

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