docs(original): update 2025 plan

Author: lzwjava

original/2025-01-06-plan-2025-en.md

@@ -18,7 +18,7 @@ title: Plan for 2025
   * Mao Zedong Thought and Theory of Socialism with Chinese Characteristics
   * Basic Electronic Technology (III)
 
-* Course Preparation. Prepare 1 courses:
+* Course Preparation. Prepare 1 course:
   * Ideological and Moral Cultivation and Rule of Law
 
 * Exam Result: Check the exam results at the end of May and November.