[RISCV] Fix typo in header of llvm/test/CodeGen/RISCV/rvv/select-fp.ll. NFC.

I believe that the second and third llc tests in the header tend to use
zvfhmin extension rather than zvfh; otherwise, they would be duplicates.

Author: tclin914

llvm/test/CodeGen/RISCV/rvv/select-fp.ll

@@ -3,9 +3,9 @@
 ; RUN:     -verify-machineinstrs < %s | FileCheck %s
 ; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+zvfh,+v -target-abi=lp64d \
 ; RUN:     -verify-machineinstrs < %s | FileCheck %s
-; RUN: llc -mtriple=riscv32 -mattr=+d,+zfh,+zvfh,+v -target-abi=ilp32d \
+; RUN: llc -mtriple=riscv32 -mattr=+d,+zfh,+zvfhmin,+v -target-abi=ilp32d \
 ; RUN:     -verify-machineinstrs < %s | FileCheck %s
-; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+zvfh,+v -target-abi=lp64d \
+; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+zvfhmin,+v -target-abi=lp64d \
 ; RUN:     -verify-machineinstrs < %s | FileCheck %s
 
 define <vscale x 1 x half> @select_nxv1f16(i1 zeroext %c, <vscale x 1 x half> %a, <vscale x 1 x half> %b) {