Change deprecated syntax

content/francais/sections/call-to-action.md

@@ -9,6 +9,6 @@ button:
   link: "https://github.com/zeon-studio/hugoplate"
 
 # don't create a separate page
-_build:
+build:
   render: "never"
 ---

content/francais/sections/testimonial.md

@@ -21,6 +21,6 @@ testimonials:
     content: "bim mon texte"
 
 # don't create a separate page
-_build:
+build:
   render: "never"
 ---