doc: update CHANGELOG.md for recent changes

[fangfufu]

Document recent CI improvements, including CodeQL workflow scan addition, Prettier replacement with yamlfmt/mdformat, pre-commit pr restrictions, and documentation grammar and typo fixes.

Summary by CodeRabbit

• Chores

  • Enhanced CI/CD workflows with CodeQL security scanning.
  • Updated workflow configurations and formatting standards.

• Documentation

  • Fixed documentation typos and improved formatting.
  • Updated usage documentation and guidelines.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 789d5ab9-b2db-4b73-9af9-462f62f885b1

📥 Commits

Reviewing files that changed from the base of the PR and between 520f162 and 7cc5a51.

📒 Files selected for processing (1)

• CHANGELOG.md

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📝 Walkthrough

Walkthrough

CHANGELOG.md's [Unreleased] section is expanded with three new entries: a CodeQL job for GitHub Actions workflows, CI and documentation improvements (formatter changes and pre-commit restrictions), and documentation typo corrections.

Changes

Changelog Updates

Layer / File(s)	Summary
Changelog entries for unreleased changes CHANGELOG.md	The [Unreleased] section documents a new CodeQL scanning job, expanded CI changes (yamlfmt/mdformat adoption, pre-commit branch restriction, README grammar fix), USAGE.md documentation expansion, and documentation typo corrections.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• fangfufu/httpdirfs#290: Updates CHANGELOG.md to document the same CI/formatter changes (CodeQL job, pre-commit restriction, yamlfmt/mdformat, build PKG_CONFIG_PATH) that this PR records.
• fangfufu/httpdirfs#289: Implements the CodeQL workflow job that this PR's changelog entry documents.
• fangfufu/httpdirfs#288: Contains the USAGE.md overhaul that this PR's changelog references and documents.

Poem

🐰 A changelog hop, so neat and clean,
Recording changes yet unseen,
CodeQL scans and formatters bright,
Pre-commit rules set just right,
Documentation typos take flight! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dev

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[gemini-code-assist]

Code Review

This pull request updates the CHANGELOG.md file under the [Unreleased] section to document recent changes, including CI updates (such as adding a CodeQL scanning job, replacing Prettier with yamlfmt and mdformat, and restricting pre-commit hooks to the master branch) and documentation fixes. There are no review comments, and I have no feedback to provide.