build(deps): bump llvm-project from 50bd355 to acc2a72

Bumps [llvm-project](https://github.com/Xilinx/llvm-aie) from `50bd355` to `acc2a72`.
- [Release notes](https://github.com/Xilinx/llvm-aie/releases)
- [Commits](Xilinx/llvm-aie@50bd355...acc2a72)

---
updated-dependencies:
- dependency-name: llvm-project
  dependency-version: acc2a72c8cbe358ce27ba01460c19ab14f2b651c
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]