chore(issue-app): correct issue app config file

Author: helloqiu

.github/issue-close-app.yml

@@ -4,12 +4,12 @@ issueConfigs:
 # There can be several configs for different kind of issues.
 - content:
 # Example 1: bug report
-  - "Expected Behavior"
+  - "Expected behavior"
   - "To Reproduce"
   - "Describe the bug"
 - content:
 # Example 2: feature request
-  - "Describe the solution"
+  - "Describe the solution you'd like"
 - content:
   - "问题描述"
   - "复现步骤"