flake.lock: Updating 'revealjs (hakimel/reveal.js)' - b1a9842b -> cd019514

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Changes for revealjs

On branch: master Commits: https://github.com/hakimel/reveal.js/compare/b1a9842b2f4544a2fda546383db38cc7a81f6b74...cd019514f3d4924bae6caaaf5383a068cc1320d7

• ea6b7197 Add RFC3986-compliant URL format encoding
• 7de6ccb6 add sortFragmentsOnSync option, makes it possible to avoid unwanted sorting in editing environments like slides.com
• dcae8a4d Fix overview spacing for disabled auto layout (hakimel/reveal.js⁠#3291)
• 2cacfc13 remove commented out config
• 1bfc6990 Black & White compact themes with verbatim headers. (hakimel/reveal.js⁠#3310)
• cd019514 rename high contrast themes, dont change anything else compared to black/white themes hakimel/reveal.js⁠#3310