Fix documentations and samples mentioning custom-commands instead of custom_commands (#3745)

Author: guillaumeboehm

docs/cli_parameters/config/config_options.csv

@@ -8,7 +8,7 @@ disk_config,*Read more under* :ref:`disk config`,Contains the desired disk setup
 disk_encryption,*Read more about under* :ref:`disk encryption`,Parameters for disk encryption applied on top of ``disk_config``,No
 hostname,``str``,A string defining your machines hostname on the network *(defaults to ``archinstall``)*,No
 kernels,[ `linux <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_!, `linux-hardened <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_!, `linux-lts <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_!, `linux-rt <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_!, `linux-rt-lts <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_!, `linux-zen <https://wiki.archlinux.org/title/Kernel#Officially_supported_kernels>`_ ],Defines which kernels should be installed and setup in the boot loader options,Yes
-custom-commands,*Read more under* :ref:`custom commands`,Custom commands that will be run post-install chrooted inside the installed system,No
+custom_commands,*Read more under* :ref:`custom commands`,Custom commands that will be run post-install chrooted inside the installed system,No
 locale_config,{kb_layout: `lang <https://wiki.archlinux.org/title/Linux_console/Keyboard_configuration>`__!, sys_enc: `Character encoding <https://wiki.archlinux.org/title/Locale>`_!, sys_lang: `locale <https://wiki.archlinux.org/title/Locale>`_},Defines the keyboard key map!, system encoding and system locale,No
 mirror_config,{custom_mirrors: [ https://... ]!, mirror_regions: { "Worldwide": [ "https://geo.mirror.pkgbuild.com/$repo/os/$arch" ] } },Sets various mirrors *(defaults to ISO's ``/etc/pacman.d/mirrors`` if not defined)*,No
 network_config,*`see options under Network Configuration`*,Sets which type of *(if any)* network configuration should be used,No

docs/cli_parameters/config/custom_commands.rst

@@ -11,7 +11,7 @@ The option takes a list of arguments, an example is:
 .. code-block:: json
 
    {
-       "custom-commands": [
+       "custom_commands": [
            "hostname new-hostname"
        ]
    }

examples/custom-command-sample.json

@@ -24,7 +24,7 @@
     "sys-language": "en_US",
     "timezone": "Europe/Stockholm",
     "version": "2.3.1.dev0",
-    "custom-commands": [
+    "custom_commands": [
         "cd /home/devel; git clone https://aur.archlinux.org/paru.git",
         "chown -R devel:devel /home/devel/paru",
         "usermod -aG docker devel"

schema.json

@@ -39,7 +39,7 @@
             "description": "Set to true to use unified kernel images",
             "type": "boolean"
         },
-        "custom-commands": {
+        "custom_commands": {
             "description": "Custom commands to be run post install",
             "type": "array",
             "items": {