Update cheatsheet.en.md

12.temporary_ins/90.electromagnetism-in-vacuum/10.maxwell-equations/20.overview/cheatsheet.en.md

@@ -124,7 +124,7 @@ $`\def\PSclosed{\mathscr{S}_{\displaystyle\tiny\bigcirc}}`$
 * These 4 equations **unify electricity, magnetism, and optics** within electromagnetism,
   and expand optics to a *new world: electromagnetic waves*.
 
-![Maxwell's Equations](Maxwell-equation-fr.png)
+![Maxwell's Equations](Maxwell-equation-en.png)
 *Maxwell modified two of the equations of electrostatics and magnetostatics by
 introducing coupling terms between E and B,
 thus revolutionizing physics.*