fix(openapi): allow user to override accept from the schema

[ardatan]

Closes #4408

[vercel]

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Name	Status	Preview	Updated
graphql-mesh	✅ Ready (Inspect)	Visit Preview	Sep 1, 2022 at 8:56PM (UTC)

[changeset-bot]

🦋 Changeset detected

Latest commit: 785a644

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@omnigraph/openapi	Patch
@graphql-mesh/openapi	Patch
@graphql-mesh/container	Patch
nextjs-apollo-example	Patch
nextjs-sdk-example	Patch
javascript-wiki	Patch
typescript-location-weather-example	Patch
openapi-stackexchange	Patch
openapi-stripe	Patch
openapi-subscriptions	Patch
openapi-youtrack	Patch

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[github-actions]

🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-mesh/container	0.1.143-alpha-20220901205323-43bb2d1c6	npm ↗︎ unpkg ↗︎
@graphql-mesh/openapi	0.33.2-alpha-20220901205323-43bb2d1c6	npm ↗︎ unpkg ↗︎
@omnigraph/openapi	0.14.2-alpha-20220901205323-43bb2d1c6	npm ↗︎ unpkg ↗︎