[llvm] [LoopFusion] Correction in the comments (NFC) (PR #184689)

[via llvm-commits]

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@@ -545,15 +545,13 @@ struct LoopFuser {
 
         collectFusionCandidates(LV);
         Changed |= fuseCandidates();
+        // All loops in the candidate sets have a common parent (or not parent).
+        // Next loop vector, will include loops with a different parent. It is
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sweiglbosker wrote:

```suggestion
        // Next loop vector will include loops with a different parent. It is
```

https://github.com/llvm/llvm-project/pull/184689