[mod] Change devinstall doc link to poetry

public/install.html

@@ -45,7 +45,7 @@
       <h2><br>
         <span style="color: white;"></span></h2>
       <h2><span style="color: white;">For developer</span></h2>
-      <span style="color: white;"><a href="https://git.duniter.org/clients/python/silkaj/blob/dev/doc/install_pipenv.md">Install
+      <span style="color: white;"><a href="https://git.duniter.org/clients/python/silkaj/blob/dev/doc/install_poetry.md">Install
           development environment</a><br>
         <br>
       </span><br>

public/installationfr.html

@@ -48,7 +48,7 @@
         <span style="color: white;"></span></h2>
       <h2><span style="color: white;">Pour développeur<br>
         </span></h2>
-      <span style="color: white;"><a href="https://git.duniter.org/clients/python/silkaj/blob/dev/doc/install_pipenv.md">Installation
+      <span style="color: white;"><a href="https://git.duniter.org/clients/python/silkaj/blob/dev/doc/install_poetry.md">Installation
           de l’environement de dévelopement</a><br>
         <br>
       </span><br>