Tweak global ruff config

Add D203 to the exempt list because it conflicts with how the ruff
formatter works by default.

.config/ruff/pyproject.toml

@@ -42,6 +42,7 @@ select = [
 
 ignore = [
     "ANN101", # No type hint for "self" - not necessary and makes noisy code
+    "D203",   # Blank line required before class docstring - conflicts with ruff's own formatter
     "D211",   # No line before class, incompatible with D203 - one line before class
     "D212",   # Summary on first line; incompatible with D213 - summary on second line
     "D400"    # Summary should end with period - duplicates D415 - summary ends with punctuation