[Term Entry] Dart List .join()

[GregDev800]

Description

• Added the .join() method term for Dart
• Closes issue #4311

Issue Solved

Type of Change

• Adding a new entry

Checklist

• [x] All writings are my own.
• [x] My entry follows the Codecademy Docs style guide.
• [x] My changes generate no new warnings.
• [x] I have performed a self-review of my own writing and code.
• [x] I have checked my entry and corrected any misspellings.
• [x] I have made corresponding changes to the documentation if needed.
• [x] I have confirmed my changes are not being pushed from my forked main branch.
• [x] I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• [x] I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.

[GregDev800]

Hi, some changes have been made.

[GregDev800]

Changes incorporated.

[GregDev800]

Changes applied.

[GregDev800]

@GregDev800 I have suggested removing the separate example subheadings and just keeping a common one. Please make the changes and let me know once done.

Done.

[github-actions[bot]]

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