Update cheatsheet.fr.md

12.temporary_ins/90.electromagnetism-in-vacuum/30.maxwell-electromagnetism-potentials/cheatsheet.fr.md

@@ -112,7 +112,7 @@ RÉSUMÉ
 
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-* *$`div\,\overrightarrow{B} = 0\quad`$ (Maxwell-Thomson)*   
+* *$`\mathbf{div\,\overrightarrow{B} = 0}\quad`$ (Maxwell-Thomson)*   
 <br>
 $`\color{blue}{\scriptsize{\left.\begin{align} &\forall \overrightarrow{V}\,,\, 
   div \,(\overrightarrow{rot}\,\overrightarrow{V})=0\\
@@ -122,7 +122,7 @@ $`\color{blue}{\scriptsize{\left.\begin{align} &\forall \overrightarrow{V}\,,\,
 $`\exists\overrightarrow{A}\,,\, \large{\color{brown}{\overrightarrow{B}=\overrightarrow{rot}\,\overrightarrow{A}}}`$
 
 
-* *$`\overrightarrow{rot}\,\overrightarrow{E}=-\dfrac{\partial \overrightarrow{B}}{\partial t}\quad`$(Maxwell-Faraday)*   
+* *$`\mathbf{\overrightarrow{rot}\,\overrightarrow{E}=-\dfrac{\partial \overrightarrow{B}}{\partial t}}\quad`$(Maxwell-Faraday)*   
 <br>
 $`\quad\quad\;=-\dfrac{\partial \big(\overrightarrow{rot}\,\overrightarrow{A}\big)}{\partial t}`$   
 <br>