Update pyproject.toml

Author: herumes

pyproject.toml

@@ -80,5 +80,5 @@ key = "etc.tools.key:show_key"
 contr = "etc.tools.contributors:main"
 
 [build-system]
-requires = ["poetry-core"]
-build-backend = "poetry.core.masonry.api"
+requires = ["poetry-core==1.8.1"]
+build-backend = "poetry.core.masonry.api"