docs: zh_CN: avoid duplicate citation references

docs: zh_CN: avoid duplicate citation references

    Documentation/process/management-style.rst:35: WARNING: duplicate label decisions, other instance in     Documentation/translations/zh_CN/process/management-style.rst
    Documentation/process/programming-language.rst:37: WARNING: duplicate citation c-language, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:38: WARNING: duplicate citation gcc, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:39: WARNING: duplicate citation clang, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:40: WARNING: duplicate citation icc, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:41: WARNING: duplicate citation gcc-c-dialect-options, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:42: WARNING: duplicate citation gnu-extensions, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:43: WARNING: duplicate citation gcc-attribute-syntax, other instance in     Documentation/translations/zh_CN/process/programming-language.rst
    Documentation/process/programming-language.rst:44: WARNING: duplicate citation n2049, other instance in     Documentation/translations/zh_CN/process/programming-language.rst

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>