Fix deprecation message
Fix deprecation message

Correct package name in `llvmlite.llvmpy.core`.

Co-authored-by: Siu Kwan Lam <e95e906260a7598cb60b4ce2d493caf7f665650c@users.noreply.github.com>
numba/llvmlite,numba/llvmlite,numba/llvmlite,numba/llvmlite