v1.3.1

Feature

• Added support for mermaid diagrams (ce5f181, 3ae4b0a)
• Added more social icons (5df8a10)
• Added a color theme switch for Giscus (00ac00f)
• Added an Umami icon to the footer (7940653)

Fix

• Fixed wrong style when there is no "colorTheme" and "colorThemeSwitcher" present (a38138f)
• Fixed style errors of <code> and <pre> elements (d557d2e)
• Fixed the Table of Contents (ToC) appearing on non-ToC pages (3d600a7)

Enhance

• Added translation for Simplified Chinese (2e323fe)
• Changed the icon for the "Copy Code" button (b83804c)
• Fixed the margin of the RSS icon (e61809d)