chore: change imperative default to false

Author: shenxianpeng

README.md

@@ -118,7 +118,7 @@ jobs:
 ### `imperative`
 
 - **Description**: check commit message is imperative mood.
-- Default: `true`
+- Default: `false`
 
 ### `dry-run`
 

action.yml

@@ -32,7 +32,7 @@ inputs:
   imperative:
     description: check commit message is in imperative mood
     required: false
-    default: true
+    default: false
   dry-run:
     description: run checks without failing
     required: false