Merge pull request #1721 from ajnelson-nist/catch_toml_rename

Merging with one review as this does not change behavior and fixes a reference to a non existing file.

.github/workflows/validate.yaml

@@ -87,7 +87,7 @@ jobs:
             1>&2 echo "Running with fuseki"
             test_harness+="./with-fuseki.sh"
           fi
-          black --config black.toml --check --diff ./rdflib || true
+          black --config pyproject.toml --check --diff ./rdflib || true
           isort --check-only --diff . || true
           flake8 --exit-zero rdflib
           mypy --show-error-context --show-error-codes