fix context sentences in YAML to ensure vocab emphasis

docs/howtostudykorean/unit-1/25-anybody-everybody.md

@@ -185,7 +185,7 @@ vocabulary:
           en: I didn't see anybody/I saw **nobody**
         - ko: 저는 **아무도** 만나고 싶지 않아요
           en: I don't want to meet anybody/I want to meet **nobody**
-        - ko: 아무도 집에 가지 않았어요
+        - ko: "**아무도** 집에 가지 않았어요"
           en: "**Nobody** went home"
         - ko: 저는 그 말을 **아무에게도** 안 했어요
           en: I didn't say that to anybody/I said that to **nobody**
@@ -277,7 +277,7 @@ vocabulary:
       examples:
         - ko: 돈이 없어서 갈 수 있는 **데**가 없었어요
           en: He had **nowhere** to go because he had no money
-        - ko: 우리가 처음에 만난 데에 갔어요
+        - ko: 우리가 처음에 만난 **데**에 갔어요
           en: We went to the **place** that we met for the first time
         - ko: 그녀가 사는 **데**는 조금 멀어요
           en: She lives a little bit far (The **place** that she lives is a little far)