Reorder the load_node docs to make requirement clear.

[noklam]

Description

Fix # #3643

• add the jupyter dependencies into starter kedro-starters#229

Development notes

The issue mentions that we should add ipylab into the documentation. We already have it, but I guess we could make this clearer by moving the requirements to the top of the section.

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Checklist

• Read the contributing guidelines
• Signed off each commit with a Developer Certificate of Origin (DCO)
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes
• Checked if this change will affect Kedro-Viz, and if so, communicated that with the Viz team