reveal-md: 5.5.2 -> 6.1.2

[imincik]

Description of changes

Update reveal-md to the latest major version.

This version update is fixing PDF print function.

Manually tested:

$ nix shell nixpkgs/nixpkgs-unstable#chromium 

cd <PRESENTATION>

./result/bin/reveal-md presentation.md --print-size A4 --print presentation.pdf --puppeteer-chromium-executable $(which chromium)

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

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[imincik]

I am using reveal-md from this PR to write my next conference talk and it looks working very well, including print and PDF export which doesn't work in current version.

[wegank]

Result of nixpkgs-review pr 321453 run on aarch64-linux 1

1 package built:

• reveal-md

[imincik]

Thanks @wegank