docs: README indicates 0.39 supports LLVM 14, but `ffi/build.py` requires LLVM 11

[wdconinc]

The README includes in the compatibility table the following:

llvmlite versions	compatible LLVM versions
0.41.0 - ...	14.x.x
0.37.0 - 0.40.0	11.x.x-14.x.x

But ffi/build.py requires LLVM 11 through 0.39. Only with 0.40 does it seem that building with LLVM 14 became possible.

Should the table indicate the following?

llvmlite versions	compatible LLVM versions
0.41.0 - ...	14.x.x
0.40.0	11.x.x-14.x.x
0.37.0 - 0.39.1	11.x.x

[esc]

@wdconinc thank you for the report. We will discuss this today in the developer meeting.

[esc]

This will need some fixes, will make a PR.

[esc]

@wdconinc can you take a look at: https://github.com/numba/llvmlite/pull/958 -- should fix the issue.

[esc]

958 was merged, so closing this. llvmlite 0.41.x will support LLVM 14 only.