Update textbook.en.md

00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.en.md

@@ -43,6 +43,24 @@ graph LR
   File --> |triggers| Pipeline
   Pipeline --> |updates| Website
 ```
+<br>
+
+```mermaid
+graph LR
+  subgraph M3P2
+    File[File]
+    Website[Website]
+    Pipeline[Pipeline]
+  end
+
+  Teacher((Teacher))
+  Student((Student))
+
+  Student --> |reads| Website
+  Teacher --> |edits| File
+  File --> |triggers| Pipeline
+  Pipeline --> |updates| Website
+```<br>
   
 ```mermaid
 graph LR