[clang] Fix double-quotes in diagnostic when attempting to access a ext_vector of bools (PR #118186)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik commented:

Thank you for your contribution, please add a more detailed summary to your PR. Your summary should if your title describes the problem sufficiently describe how you will fix the problem.

https://github.com/llvm/llvm-project/pull/118186