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

[Yingwei Zheng via cfe-commits]

================
@@ -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
 let UnMaskedPolicyScheme = HasPassthruOperand in {
 defm vsll : RVVShiftBuiltinSet;
 defm vsrl : RVVUnsignedShiftBuiltinSet;
 defm vsra : RVVSignedShiftBuiltinSet;
 
-// 12.7. Vector Narrowing Integer Right Shift Instructions
+// 11.7. Vector Narrowing Integer Right Shift Instructions
 defm vnsrl : RVVUnsignedNShiftBuiltinSet;
 defm vnsra : RVVSignedNShiftBuiltinSet;
 }
 defm vncvt_x_x_w : RVVPseudoVNCVTBuiltin<"vnsrl", "vncvt_x", "csi",
                                          [["v", "vw"],
                                           ["Uv", "UvUw"]]>;
 
-// 12.8. Vector Integer Comparison Instructions
+// 11.8. Vector Integer Comparison Instructions
----------------
dtcxzyw wrote:

11.8. Vector Integer Compare Instructions

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