add scroll-x to graphiql tabs area

[dimaMachina]

fixes #3931

[changeset-bot]

🦋 Changeset detected

Latest commit: eb0d875

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

This PR includes changesets to release 2 packages

Name	Type
@graphiql/react	Patch
graphiql	Patch

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[github-actions]

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

graphiql@4.0.3-canary-ee3ef668.0
@graphiql/plugin-code-exporter@4.0.3-canary-ee3ef668.0
@graphiql/plugin-doc-explorer@0.0.2-canary-ee3ef668.0
@graphiql/plugin-explorer@4.0.3-canary-ee3ef668.0
@graphiql/plugin-history@0.0.3-canary-ee3ef668.0
@graphiql/react@0.32.2-canary-ee3ef668.0