v9.1.1

• Added tooltips to post subtitles and last-modified-at lines.
• Added tooltips to abberavations (<abbr> tags)
• Added tooltips to social media icons (inside main column only)
• Fixed KaTeX font rendering
• [PRO] Setting clap_button: false will hide the clap button preview, even in development
• [PRO] A overscrolling ToC will scroll itself to keep the active element in view.