fix typo

chapters/6.2.1-cd.md

@@ -1,7 +1,7 @@
 持续交付
 ---
 
-![CD Workflow](chapters/chapter4/continuous-delivery.jpg)
+![CD Workflow](chapters/chapter6/continuous-delivery.jpg)
 
 1. 自动化
 2. DevOps

growth.md

@@ -3992,7 +3992,7 @@ UX入门
 持续交付
 ---
 
-![CD Workflow](chapters/chapter4/continuous-delivery.jpg)
+![CD Workflow](chapters/chapter6/continuous-delivery.jpg)
 
 1. 自动化
 2. DevOps

index.html

@@ -3241,7 +3241,7 @@ System.<span class="fu">out</span>.<span class="fu">println</span>(<span class="
 <p>-《持续交付：发布可靠软件的系统方法》</p>
 <h2 id="持续交付-1">持续交付</h2>
 <figure>
-<img src="chapters/chapter4/continuous-delivery.jpg" alt="CD Workflow" /><figcaption>CD Workflow</figcaption>
+<img src="chapters/chapter6/continuous-delivery.jpg" alt="CD Workflow" /><figcaption>CD Workflow</figcaption>
 </figure>
 <ol type="1">
 <li>自动化</li>