add process of apply-for-credits

process/borrow-classroom.md

@@ -35,8 +35,11 @@ graph TD
 
 ```mermaid
 graph TD
-    A[填写&修改申报表] -->|按模板| B[提交校素拓部负责人]
-    C[项目结束] -->|填写学分名单(按模板)| D[提交校素拓部负责人]
-    D --> E[社内留档]
-
+  A[填写和修改二课堂学分申报表] --> B[确定人员、学分数额]
+  B --> C[交到校素拓部负责人]
+  C --> D{审核通过?}
+  D -- 否,修正 --> B 
+  D -- 是 --> E[填写和修改学分申报名单]
+  E --> F[交到校素拓部负责人]
+  F --> G[社内留档一份]
 ```