[Term Entry] C++ Deque: swap()

[Allofsimeon]

Description

• Added the swap() term for C++

Issue Solved

• Closes Issue [Term Entry] C++ Deque: swap() #7655

Type of Change

• Adding a new entry

Checklist

All writings are my own.

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

[CLAassistant]

All committers have signed the CLA.

[mamtawardhani]

Looks good for a second review! 🚀

[Allofsimeon]

@mamtawardhani Thank you for the edits. What do I do for the last check to complete?

[dakshdeepHERE]

Looks good for the merge 🚀

[github-actions]

👋 @Allofsimeon
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