[llvm] [LangRef] Clarify that the pointer after an objet must be valid. (PR #127892)

[Nikita Popov via llvm-commits]

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@@ -26458,7 +26469,7 @@ Overview:
 """""""""
 
 The '``llvm.invariant.end``' intrinsic specifies that the contents of a
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nikic wrote:

```suggestion
The '``llvm.invariant.end``' intrinsic specifies that the contents of an
```

https://github.com/llvm/llvm-project/pull/127892