[RISCV] edit document of Zcb to match the Implementation

[VincentWu]

Summary

This patch reorder the list of Experimental Extensions in doc,
and change the spec verision in doc to match the actual Implementation

if this patch is so small that it is not worth to submit separately, Apologies for bothering

[craig.topper]

LGTM

llvm/docs/RISCVUsage.rst

 The primary goal of experimental support is to assist in the process of ratification by providing an existence proof of an implementation, and simplifying efforts to validate the value of a proposed extension against large code bases.  Experimental extensions are expected to either transition to ratified status, or be eventually removed.  The decision on whether to accept an experimental extension is currently done on an entirely case by case basis; if you want to propose one, attending the bi-weekly RISC-V sync-up call is strongly advised.
 
 ``experimental-zawrs``
   LLVM implements the `1.0-rc3 draft specification <https://github.com/riscv/riscv-zawrs/releases/download/V1.0-rc3/Zawrs.pdf>`_.  Note that have been backwards incompatible changes made between release candidates for the 1.0 draft.
 
 ``experimental-zca``
   LLVM implements the `1.0.1 draft specification <https://github.com/riscv/riscv-code-size-reduction/releases/tag/v1.0.1>`_.
 
+``experimental-zcb``
+  LLVM implements the `1.0.1 draft specification <https://github.com/riscv/riscv-code-size-reduction/releases/tag/v1.0.1>`_.
+
 ``experimental-zcd``
   LLVM implements the `1.0.1 draft specification <https://github.com/riscv/riscv-code-size-reduction/releases/tag/v1.0.1>`_.
 
 ``experimental-zcf``
   LLVM implements the `1.0.1 draft specification <https://github.com/riscv/riscv-code-size-reduction/releases/tag/v1.0.1>`_.
 
-``experimental-zcb``
-  LLVM implements the `0.70 draft specification <https://github.com/riscv/riscv-code-size-reduction/releases/tag/V0.70.1-TOOLCHAIN-DEV>`_.
-
 ``experimental-zihintntl``
   LLVM implements the `0.2 draft specification <https://github.com/riscv/riscv-isa-manual/releases/tag/draft-20220831-bf5a151>`_.
 
 ``experimental-ztso``
   LLVM implements the `v0.1 proposed specification <https://github.com/riscv/riscv-isa-manual/releases/download/draft-20220723-10eea63/riscv-spec.pdf>`_ (see Chapter 25).  The mapping from the C/C++ memory model to Ztso has not yet been ratified in any standards document.  There are multiple possible mappings, and they are *not* mutually ABI compatible.  The mapping LLVM implements is ABI compatible with the default WMO mapping.  This mapping may change and there is *explicitly* no ABI stability offered while the extension remains in experimental status.  User beware.
 
 ``experimental-zvfh``
   LLVM implements `this draft text <https://github.com/riscv/riscv-v-spec/pull/780>`_.