Update fulfilling-requests.mdx with a clear statment about the JobId without dashes in Remix

[jensamberg]

Closing issues

closes #3091

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Description

In the documentation to Fullfilling a Request in the Section Create a request to your node in point 7 the externalJobID is needed without dashes. However by default the Chainlink Node creates JobIds with dashes and when you put the JobId with dashes in Remix now error is thrown. And newcommer have no idea why the Node does not run the job.

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Changes

I added a clear statement for that in the documentation and an example.

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