docs: Update on the system argument

Author: akirak

doc/src/content/docs/patterns/nix-systems.mdoc

@@ -39,8 +39,8 @@ To use nix-systems, follow these steps:
    ```diff lang="nix" title="flake.nix"
       eachSystem =
         f:
-   -    nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f nixpkgs.legacyPackages.${system});
-   +    nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
+   -    nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f system nixpkgs.legacyPackages.${system});
+   +    nixpkgs.lib.genAttrs (import systems) (system: f system nixpkgs.legacyPackages.${system});
    ```
 
 {% /steps %}

doc/src/content/docs/recipes/go/executable.mdoc

@@ -53,7 +53,7 @@ To expose the program as a Nix flake package, comment out the stub inside
 1. Adapt `pname` and `version` to match your package information:
 
    ```diff lang="nix" title="flake.nix"
-         packages = eachSystem (pkgs: {
+         packages = eachSystem (_system: pkgs: {
            default = pkgs.buildGoModule {
    -         pname = "hello";
    +         pname = "your-go-program";
@@ -77,7 +77,7 @@ To expose the program as a Nix flake package, comment out the stub inside
    the output.
 
    ```diff lang="nix" title="flake.nix"
-         packages = eachSystem (pkgs: {
+         packages = eachSystem (_system: pkgs: {
            default = pkgs.buildGoModule {
              ...intensionaly omitted
              src = self.outPath;

doc/src/content/docs/recipes/ocaml/generic-dune.mdoc

@@ -232,12 +232,11 @@ To run sherlodoc, follow this instruction.
 
    ```diff lang="nix" title="flake.nix"
          devShells = eachSystem (
-           { pkgs, ocamlPackages, ... }:
-           {
+           system: pkgs: {
              default = pkgs.mkShell {
-               inputsFrom = [ self.packages.${pkgs.stdenv.hostPlatform.system}.default ];
+               inputsFrom = [ self.packages.${system}.default ];
                buildInputs = (
-                 with ocamlPackages;
+                 with pkgs.ocamlPackages;
                  [
                    ocaml-lsp
                    ocamlformat

doc/src/content/docs/recipes/typescript/web-framework.mdoc

@@ -92,7 +92,7 @@ project. Below are some links:
 
    ```nix
     {
-      devShells = eachSystem (pkgs: {
+      devShells = eachSystem (_system: pkgs: {
         default = pkgs.mkShell {
           buildInputs = [
             ...
@@ -112,7 +112,7 @@ Open `flake.nix` and comment out the corresponding package name in the `package`
 field of the default shell, depending on the package manager of your choice.
 
    ```diff lang="nix" title="flake.nix"
-         devShells = eachSystem (pkgs: {
+         devShells = eachSystem (_system: pkgs: {
            default = pkgs.mkShell {
              buildInputs = [
                pkgs.nodejs