📝docs: add changelog for v2.8.0

CHANGELOG.md

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+# AMP Affiliately Jekyll Theme Changelog
+
+## v2.8.0 (2024-01-15)
+
+Release v2.8.0 contains various improvements and fixes for the project. The changes are grouped into the following categories:
+
+### ⬆️ Dependencies
+
+- Update cheerio to fix ReDoS vulnerability
+- Update postcss for AMP Optimizer
+- Update glob-parent to fix ReDoS vulnerability
+- Bump semver from 5.7.1 to 5.7.2
+- Bump caniuse-lite from 1.0.30001431 to 1.0.30001576
+- Bump decode-uri-component from 0.2.0 to 0.2.2
+
+### 🎨 Style
+
+- Rebuild minified CSS and SCSS files for the theme
+- Hide Disqus ads and GitHub sponsor button with CSS
+- Format Liquid snippets in the post.html file
+
+### 🐛 Fixes
+
+- Resolve AMP optimizer warning in the continuous integration workflow
+- Resolve a conflict caused by the Jekyll Archives plugin in the build process
+- Fix the AMP CSS issue and the Iframe issue in AMP
+- Fix the potential XSS vulnerability in jQuery
+
+### ✨ Features
+
+- Add AMP Optimizer logs to the gulp task
+- Hide the `gh-pages` branch from the Git Graph in VS Code
+
+### 🗑️ Removed/Deprecated
+
+- Remove VigLink affiliate program from the theme
+- Remove amp-link-rewriter extension from the theme
+- Remove the CodeQL Action from the GitHub Workflows as it is deprecated
+- Schedule the deprecation of some gulp modules that are no longer needed
+
+### ♻️ Refactor
+
+- Simplify author logic in the post.html file
+
+### 🔧 Chore
+
+- Update the Front Matter CMS database and the recommended VS Code extensions
+- Update the Actions to run on Node 16 instead of Node 12
+
+### 📝 Documentations
+
+- Fix typos and broken links in the README file
+- Fix broken links in Config Guide and Media pages
+- Remove jekyll-gist from whitelist package list in the Plugin page
+- Add the docs for embedding gists by using the `<amp-gist>` components to the Code page
+
+### Related Issue(s)
+
+- [#27](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/27)
+- [#45](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/45)
+- [#46](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/46)
+- [#48](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/48)
+- [#49](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/49)
+- [#50](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/50)
+- [#52](https://github.com/chriskyfung/amp-affiliately-jekyll-theme/issues/52)