[clang] [clang][docs]Remove references to c94 standard (PR #206403)

[Aaron Ballman via cfe-commits]

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@@ -35,7 +35,7 @@ which includes :ref:`C <c>`, :ref:`Objective-C <objc>`, :ref:`C++ <cxx>`, and
 language-specific information, please see the corresponding language
 specific section:
 
--  :ref:`C Language <c>`: K&R C, ANSI C89, ISO C90, C94 (C89+AMD1), C99 (+TC1,
+-  :ref:`C Language <c>`: K&R C, ANSI C89, ISO C90, C99 (+TC1,
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AaronBallman wrote:

I would rather we document that we support C95, perhaps with `C95 (C90+AMD1) but I'm not certain how we want to mention COR1, COR2 (or any of the corrigenda publications).

https://github.com/llvm/llvm-project/pull/206403