Update cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/40.ampere-theorem-applications/30.cylindrical-current-distributions/20.solenoidal-current/10.ampere-integral/20.overview/cheatsheet.fr.md

@@ -238,9 +238,9 @@ $`\Longrightarrow\quad\overrightarrow{dl} \cdot \overrightarrow{B}=0`$
  <br>
  **$`\mathbf{\oint_{\Gamma_A}\overrightarrow{B}\cdot\overrightarrow{dl}}`$**   
  <br>
- $`\begin{align}\quad\quad=&\int_D^A \overrightarrow{B}\cdot\,dz\overrightarrow{e_z} + \int_A^B \underbrice{\overrightarrow{B}\cdot\overrightarrow{dl}}_
+ $`\begin{align}\quad\quad=&\int_D^A \overrightarrow{B}\cdot\,dz\overrightarrow{e_z} + \int_A^B \underbrace{\overrightarrow{B}\cdot\overrightarrow{dl}}_
     {\color{blue}{=\,0}}\\
-             &\int_B^C \overrightarrow{B}\cdot\,dz\overrightarrow{e_z} + \int_C^D \underbrice{\overrightarrow{B}\cdot\overrightarrow{dl}}_
+             &\int_B^C \overrightarrow{B}\cdot\,dz\overrightarrow{e_z} + \int_C^D \underbrace{\overrightarrow{B}\cdot\overrightarrow{dl}}_
     {\color{blue}{=\,0}}
     \end{align}`$