Fix icon

resources/index.md

@@ -140,7 +140,7 @@ Various bits of information such as [new](https://git.dynare.org/Dynare/dynare/w
 <i class="icon-external-link"></i> [Old Wiki](http://www.dynare.org/DynareWiki/TableOfContents)
 </p>
 
-# <i class="icon-tool"></i> Dynare++
+# <i class="icon-book"></i> Dynare++
 Dynare++ is a set of C++ codes, originally written by Ondra Kamenik, that
 compute higher order approximations of DSGE models via a perturbation method.
 Those codes are made available both as a standalone executable program (shipped in the