Rename slave to worker in build-launcher-dmg, to use more inclusive naming.
build-launcher-dmg should be deleted, we don't build WebKit nightlies any more.
<rdar://problem/75441809>
Created attachment 423230 [details] Patch
Committed r274441: <https://commits.webkit.org/r274441> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423230 [details].