Change mypy ignore_errors value from string to a bool (#2325)

Co-authored-by: Thomas Viehmann <tv.code@beamnet.de>

Author: fnhirwa

pyproject.toml

@@ -232,4 +232,4 @@ module = [
     "thunder.tests.test_reductions",
     "thunder.tests.test_script",
 ]
-ignore_errors = "True"
+ignore_errors = True