chore(library/app_builder): fix typo in trace message
chore(library/app_builder): fix typo in trace message

leanprover/lean,javra/lean,fpvandoorn/lean,dselsam/lean,johoelzl/lean,johoelzl/lean,javra/lean,leanprover-community/lean,avigad/lean,fgdorais/lean,soonhokong/lean,rlewis1988/lean,digama0/lean,rlewis1988/lean,leanprover/lean,rlewis1988/lean,leodemoura/lean,avigad/lean,levnach/lean,leanprover/lean,Kha/lean,johoelzl/lean,soonhokong/lean-osx,fpvandoorn/lean2,levnach/lean,dselsam/lean,soonhokong/lean-windows,fpvandoorn/lean,avigad/lean,digama0/lean,digama0/lean,digama0/lean,leanprover/lean,soonhokong/lean-osx,leanprover-community/lean,digama0/lean,javra/lean,levnach/lean,soonhokong/lean,leanprover/lean,leodemoura/lean,soonhokong/lean-windows,leanprover-community/lean,fpvandoorn/lean2,johoelzl/lean,UlrikBuchholtz/lean,dselsam/lean,UlrikBuchholtz/lean,levnach/lean,leanprover/lean,avigad/lean,fgdorais/lean,fpvandoorn/lean,fgdorais/lean,Kha/lean,UlrikBuchholtz/lean,Kha/lean,Kha/lean,soonhokong/lean-osx,rlewis1988/lean,soonhokong/lean,Kha/lean,fgdorais/lean,fpvandoorn/lean2,soonhokong/lean-windows,dselsam/lean,rlewis1988/lean,rlewis1988/lean,soonhokong/lean,fgdorais/lean,levnach/lean,avigad/lean,leanprover-community/lean,leodemoura/lean,javra/lean,soonhokong/lean-osx,Kha/lean,javra/lean,johoelzl/lean,fpvandoorn/lean2,dselsam/lean,leodemoura/lean,soonhokong/lean,leanprover-community/lean,avigad/lean,leanprover-community/lean,fpvandoorn/lean2,leodemoura/lean,fpvandoorn/lean,soonhokong/lean-windows,fgdorais/lean,soonhokong/lean-windows,soonhokong/lean-osx,UlrikBuchholtz/lean,johoelzl/lean,dselsam/lean,leodemoura/lean,digama0/lean,fpvandoorn/lean,fpvandoorn/lean,UlrikBuchholtz/lean