chore(deps): update dependency openid-client to v6.8.1

[renovate]

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This PR contains the following updates:

Package	Change	Age	Confidence
openid-client	6.6.2 -> 6.8.1

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Release Notes

panva/openid-client (openid-client)

v6.8.1

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Refactor

• workaround dpop nonce caching caveats with customFetch (a9eb50f)

v6.8.0

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Features

• respect retry-after in CIBA and Device Authorization Grant polling (6ce3411)

Documentation

• remove mention of Edge Runtime from the readme (2e41ad5)

v6.7.1

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Fixes

• passport: include req.host from express@​5 for ease of use in express@​4 (81f6c12)

v6.7.0

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Features

• support for the ML-DSA Algorithm Identifiers (9543da5)

v6.6.4

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Fixes

• recognize N_A in the token exchange grant (770b177)

v6.6.3

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Documentation

• fix TokenEndpointResponseHelpers.claims() note (b77c786)

Refactor

• passport: allow custom logic to drive initiating auth requests (0b57115), closes #​811

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