[llvm] [LV] Make partial-reduction naming consistent (NFC) (PR #222377)

[Florian Hahn via llvm-commits]

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@@ -5426,8 +5425,8 @@ matchExtendedReductionOperand(VPWidenRecipe *UpdateR, VPValue *Op) {
 /// and determines if the target can use a cheaper operation with a wider
 /// per-iteration input VF and narrower PHI VF. If successful, returns the chain
 /// of operations in the reduction.
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fhahn wrote:

```suggestion
/// of link in the reduction.
```

https://github.com/llvm/llvm-project/pull/222377