ocamlPackages.sedlex_2: 2.2 -> 2.3

[marsam]

Motivation for this change

https://github.com/ocaml-community/sedlex/releases/tag/v2.3

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[r-rmcgibbo]

Result of nixpkgs-review pr 119622 at 3fd28f67 run on aarch64-linux 1

1 package failed to build:

• beluga

10 packages built successfully:

• flow
• haxe (haxe_4_2)
• hxcpp (haxePackages.hxcpp)
• haxePackages.hxcs
• haxePackages.hxjava
• haxePackages.hxnodejs_4
• libbap
• liquidsoap
• python38Packages.bap
• python39Packages.bap

Note that build failures may predate this PR, and could be nondeterministic or hardware dependent.
Please exercise your independent judgement.

---

Result of nixpkgs-review pr 119622 at 3fd28f67 run on x86_64-linux 1

1 package failed to build:

• beluga

10 packages built successfully:

• flow
• haxe (haxe_4_2)
• hxcpp (haxePackages.hxcpp)
• haxePackages.hxcs
• haxePackages.hxjava
• haxePackages.hxnodejs_4
• libbap
• liquidsoap
• python38Packages.bap
• python39Packages.bap

Note that build failures may predate this PR, and could be nondeterministic or hardware dependent.
Please exercise your independent judgement.