v4.16.0: BlueSky Social Media, Footer Enhancements, Fixes

What's Changed

• fix: "Fluid Container" should be "Fluid container" by wesleyboar in 06137b7
• feat: secrets.example.py by @wesleyboar in #861
• fix: LinkedIn icon, more role="img" to SVG by @wesleyboar in 1ba01af
• feat: add BlueSky icon to logos-social-media by @wesleyboar in 9efb52f, 34ae5d1
• deps: s-footer updates via core-styles 2.33.0 by @wesleyboar in #866, #865

Full Changelog: v4.15.2...v4.16.0