docs!: use Asciidoctor's native anchor IDs

Related: 5693149

BREAKING CHANGE: Cross references do no work on GitHub anymore.

README.adoc

@@ -2,8 +2,6 @@
 :archwiki-dotfiles: link:https://wiki.archlinux.org/title/Dotfiles
 :home-configuration-nix-5: link:https://nix-community.github.io/home-manager/options.xhtml
 :home-manager: link:https://nix-community.github.io/home-manager
-:idprefix:
-:idseparator: -
 :naho: link:https://github.com/trueNAHO
 :os: link:https://github.com/trueNAHO/os
 :repository-path: trueNAHO/dotfiles

docs/dev/contributing.adoc

@@ -1,8 +1,6 @@
 = dotfiles.dev.contributing(7)
 :commitizen: link:http://commitizen.github.io/cz-cli
 :github-flow: link:http://scottchacon.com/2011/08/31/github-flow.html
-:idprefix:
-:idseparator: -
 :toc:
 
 == Name
@@ -21,7 +19,7 @@ examples of the kinds of contributions we are looking for:
 * Portability and reproducibility improvements
 
 If you are uncertain about whether your contribution aligns with the scope of
-this project, please review <<what-we-do-not-want, what we do not want>>. Feel
+this project, please review <<_what_we_do_not_want, what we do not want>>. Feel
 free to reach out to the maintainers, if you have any questions.
 
 == What We Do Not Want
@@ -37,7 +35,7 @@ for a fork. Here are some examples that may fall into this category:
 * Increased end-user maintenance
 
 If you are uncertain about whether your contribution aligns with the scope of
-this project, please review <<what-we-want, what we want>>. Feel free to reach
+this project, please review <<_what_we_want, what we want>>. Feel free to reach
 out to the maintainers, if you have any questions.
 
 == Contribution Guidelines

docs/user/usage.adoc

@@ -1,8 +1,6 @@
 = dotfiles.dev.usage(7)
 :home-configurations-full: link:../../home_configurations/full/default.nix
 :home-manager: link:https://nix-community.github.io/home-manager
-:idprefix:
-:idseparator: -
 :nix: link:https://nixos.wiki/wiki/Nix_Installation_Guide
 :repository-path: trueNAHO/dotfiles
 :toc:
@@ -33,7 +31,7 @@ a| Uses all `modules`.
 == Examples
 :command-base: nix run nixpkgs#home-manager -- switch --flake github:{repository-path}#
 
-To build the <<home-manager-configurations, Home Manager configurations>>
+To build the <<_home_manager_configurations, Home Manager configurations>>
 directly from {repository}[upstream] using {nix}[`nix`], run one of the
 following commands: