[llvm] Update ModuleSummaryIndexBitcodeReader::makeCallList reserve amount (PR #95461)

[Jan Voung via llvm-commits]

jvoung wrote:

> Sorry, I didn't notice this PR (until I searched my name in pull-request list).
> 
> lgtm.

No worries, thanks for taking a look and helping add reviewers!

https://github.com/llvm/llvm-project/pull/95461