Update textbook.es.md

00.brainstorming-pedagogical-teams/03.presentar_el_proyecto/textbook.es.md

@@ -246,12 +246,12 @@ subgraph M3P2_servidor
     Visible[visible]
 end
 
-Prof2A -->[concerta]Prof1A
-Prof1A -->[concerta]Prof2A
-Prof2B -->[concerta]Prof1B
-Prof3B -->[concerta]Prof1B
-Prof3B -->[concerta]Prof2B
-Prof2B -->[concerta]Prof3B
+Prof2A -->|concerta|Prof1A
+Prof1A -->|concerta|Prof2A
+Prof2B -->|concerta|Prof1B
+Prof3B -->|concerta|Prof1B
+Prof3B -->|concerta|Prof2B
+Prof2B -->|concerta|Prof3B
 
 ```