exclude setup.cfg from precommit check

Author: daico007

.pre-commit-config.yaml

@@ -30,5 +30,5 @@ repos:
   rev: '6.1.1'
   hooks:
     - id: pydocstyle
-      exclude: ^(mbuild/tests/|docs/|devtools/|setup.py|mbuild/formats/charmm_writer.py|mbuild/formats/gomc_conf_writer.py|mbuild/utils/specific_ff_to_residue.py)
+      exclude: ^(mbuild/tests/|docs/|devtools/|setup.py|setup.cfg|mbuild/formats/charmm_writer.py|mbuild/formats/gomc_conf_writer.py|mbuild/utils/specific_ff_to_residue.py)
       args: [--convention=numpy]