Fix typos, spacing, and consistency issues in CODE_OF_CONDUCT.md

[AnujAga2005]

What kind of change does this PR introduce?
Documentation cleanup (spelling, punctuation, spacing, and consistency fixes)

Related Issue:
Related to json-schema-org/website#1976
(This PR corrects the typos in the canonical source of the Code of Conduct.)

Summary
This PR fixes several minor issues in the CODE_OF_CONDUCT.md file to improve clarity, consistency, and correctness:

• Corrected remaining punctuation issues (e.g., added missing comma in “inappropriate behavior, harassment…”).
• Removed a double space after a period in the IETF section.
• Updated “Applicable Sections” to use Title Case for consistency with other section headings.
• Ensured consistent American English spelling (“behavior”).
• Improved line-wrapping for readability where appropriate.

No content changes were made—only formatting, spacing, and spelling corrections.

These fixes align the document more closely with the Contributor Covenant v2.1 and OpenJS CoC formatting standards.

Screenshots / Notes
Not applicable — Markdown cleanup only.

Does this PR introduce a breaking change?
No.

Checklist

• Reviewed the document for consistency
• Ensured no semantic meaning was altered
• Changes limited to typo, spacing, punctuation, and formatting fixes
• Linked to the related downstream issue for traceability

[Copilot]

Pull request overview

This PR addresses documentation quality issues in the Code of Conduct by correcting typos, fixing spacing inconsistencies, and standardizing formatting to align with the Contributor Covenant v2.1 and OpenJS CoC standards.

• Fixed spelling errors ("assinged" → "assigned", "responsabilities" → "Responsibilities") and standardized to American English ("behaviour" → "behavior")
• Corrected spacing issues (removed double spaces after punctuation)
• Improved consistency by applying Title Case to section headings ("Applicable sections" → "Applicable Sections", "Enforcement responsabilities" → "Enforcement Responsibilities")

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