Update test for Nexus proxy

Author: mallport

tests/unit/build_test/test_files/test_nexus_source_update_pyproject.toml

@@ -11,8 +11,7 @@ python = ">=3.10,<3.11"
 [[tool.poetry.source]]
 name = "nexus"
 url = "http://pl-nexuspro-p.ssb.no:8081/repository/pypi-proxy/simple"
-default = true
-secondary = false
+priority = "primary"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]