Docs: Move magic-number from process to staging

'Other material' section on 'process/index' is for unsorted documents.
However we also have a dedicated place for the purpose, 'staging/'.
Move 'magic-number' from the section to 'staging/' directory.
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240624185312.94537-4-sj@kernel.org

Documentation/process/index.rst

@@ -113,7 +113,6 @@ lack of a better place.
 .. toctree::
    :maxdepth: 1
 
-   magic-number
    clang-format
 
 .. only::  subproject and html

Documentation/staging/index.rst

@@ -8,6 +8,7 @@ Unsorted Documentation
 
    crc32
    lzo
+   magic-number
    remoteproc
    rpmsg
    speculation

Documentation/translations/it_IT/process/magic-number.rst

 .. include:: ../disclaimer-ita.rst
 
-:Original: :ref:`Documentation/process/magic-number.rst <magicnumbers>`
+:Original: :ref:`Documentation/staging/magic-number.rst <magicnumbers>`
 :Translator: Federico Vaga <federico.vaga@vaga.pv.it>
 
 .. _it_magicnumbers:

Documentation/translations/sp_SP/process/magic-number.rst

 .. include:: ../disclaimer-sp.rst
 
-:Original: :ref:`Documentation/process/magic-number.rst <magicnumbers>`
+:Original: :ref:`Documentation/staging/magic-number.rst <magicnumbers>`
 :Translator: Carlos Bilbao <carlos.bilbao.osdev@gmail.com>
 
 .. _sp_magicnumbers:

Documentation/translations/zh_CN/process/magic-number.rst

 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: Documentation/process/magic-number.rst
+:Original: Documentation/staging/magic-number.rst
 
 :翻译:
 

Documentation/translations/zh_TW/process/magic-number.rst

@@ -4,7 +4,7 @@
 
 .. include:: ../disclaimer-zh_TW.rst
 
-:Original: :ref:`Documentation/process/magic-number.rst <magicnumbers>`
+:Original: :ref:`Documentation/staging/magic-number.rst <magicnumbers>`
 
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