The spawnSync call was previously silently failing with this error:
```sh
icupkg: unable to open input file "icudt*.dat"
```
because spawnSync doesn't support globbing. This change replaces the
spawnSync call with execSync because that supports globbing.
I have tested this workflow with some minor modifications in my fork and
I can confirm that it works as expected now. The bot opened this PR -
https://github.com/RaisinTen/node/pull/2 which updates
deps/icu-small/source/data/in/icudt71l.dat.bz2.
Fixes: https://github.com/nodejs/node/issues/44865
Signed-off-by: Darshan Sen <raisinten@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/44870
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>