Use numbered version of docformatter (#306)

Author: dachengx

.pre-commit-config.yaml

@@ -22,7 +22,7 @@ repos:
         language_version: python3
 
 -   repo: https://github.com/pycqa/docformatter
-    rev: master
+    rev: v1.7.6
     hooks:
     -   id: docformatter
         additional_dependencies: [tomli]