Update cheatsheet.en.md

12.temporary_ins/20.magnetostatics-vacuum/30.ampere-therorem-demonstration/20.overview/cheatsheet.en.md

@@ -18,7 +18,7 @@ $`\def\PSopen{\mathscr{S}_{\smile}}`$
 $`\def\PSclosed{\mathscr{S}_{\displaystyle\tiny\bigcirc}}`$
 
 !!!! *LESSON UNDER CONSTRUCTION :* <br>
-!!!! *Not published, not visible, not yet approved*<br>
+!!!! Published but invisible: does not appear in the tree structure of the m3p2.com site. This course is *under construction*, it is *not approved by the pedagogical team* at this stage. <br>
 !!!! Working document intended only for the pedagogical team.
 
 !  *Topic* :<br>