GraphiQL headers are not reused in new GIQL tab

[Moumouls]

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• 1. The issue provides a minimal reproduction available on CodeSandbox using the issue template.
  • Please install the latest @graphql-yoga/* packages that you are using.
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Describe the bug

When your setup the headers option in graphIQL like

          renderGraphiQL({
            endpoint: this.config.graphQLPath,
            subscriptionEndpoint: this.config.subscriptionsPath,
            headers: JSON.stringify({
              'X-Parse-Application-Id': this.parseServer.config.appId,
              'X-Parse-Master-Key': this.parseServer.config.masterKey,
            }),
          })

To Reproduce
Steps to reproduce the behavior:

setup the headers options, run GIQL, open a new GIQL tab. The headers is not recycled.

Expected behavior

To recycle the headers

Environment:

• OS:
• NodeJS:
• @graphql-yoga/* version(s):

Additional context