[llvm] [nfc] Rename API with typo in BranchProbabilityInfo (PR #146447)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Jul 2, 3:52 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/146447).


https://github.com/llvm/llvm-project/pull/146447