Update type checking code

Author: dstansby

pyproject.toml

@@ -310,7 +310,7 @@ extend-select = [
     "RUF",
     "SIM",  # flake8-simplify
     "SLOT", # flake8-slots
-    "TCH",  # flake8-type-checking
+    "TC",  # flake8-type-checking
     "TRY",  # tryceratops
     "UP",   # pyupgrade
     "W",    # pycodestyle warnings