[clang] [NFC][Clang][RISCV] Fix index typos of riscv-v-spec doc in riscv_vector.td (PR #65944)

[Ying Chen via cfe-commits]

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@@ -1660,29 +1660,29 @@ let HasMasked = false, MaskedPolicyScheme = NonePolicy in {
   defm vmsbc : RVVIntMaskOutBuiltinSet;
 }
 
-// 12.5. Vector Bitwise Logical Instructions
+// 11.5. Vector Bitwise Logical Instructions
 let UnMaskedPolicyScheme = HasPassthruOperand in {
 defm vand : RVVIntBinBuiltinSet;
 defm vxor : RVVIntBinBuiltinSet;
 defm vor : RVVIntBinBuiltinSet;
 }
 defm vnot_v : RVVPseudoVNotBuiltin<"vxor", "csil">;
 
-// 12.6. Vector Single-Width Bit Shift Instructions
+// 11.6. Vector Single-Width Bit Shift Instructions
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punkyc wrote:

Fix it.

https://github.com/llvm/llvm-project/pull/65944