Add missing comma; homogeneize list; use HTTPS

resources/index.md

@@ -57,18 +57,18 @@ distributed with each Dynare release and also available here:
 <i class="fas fa-file-pdf"></i> [Deterministic Models: Perfect foresight,
 nonlinearities and occasionally binding
 constraints](https://git.dynare.org/sebastien/perfect-foresight-slides/raw/master/deterministic.pdf?inline=false),
-slides by Sébastien Villemot
+by Sébastien Villemot
 </p>
 
 <p class="indent" markdown="1">
 <i class="fas fa-file-pdf"></i> [Introduction to DSGE modeling (in
 French)](https://git.dynare.org/sebastien/dsge-intro/raw/master/dsge-intro.pdf?inline=false),
-slides by Sébastien Villemot
+by Sébastien Villemot
 </p>
 
 <p class="indent" markdown="1">
 <i class="fas fa-file-pdf"></i> [Introduction to the internals of the Dynare
-Preprocessor](../assets/team-presentations/preprocessor.pdf) by Houtan Bastani
+Preprocessor](../assets/team-presentations/preprocessor.pdf), by Houtan Bastani
 and Sébastien Villemot
 </p>
 
@@ -105,7 +105,7 @@ Willi Mutscher
 </p>
 
 <p class="indent" markdown="1">
-<i class="fas fa-file-pdf"></i> [Solving rational expectations models at first order: what Dynare does](http://www.dynare.org/wp-repo/dynarewp002.pdf),
+<i class="fas fa-file-pdf"></i> [Solving rational expectations models at first order: what Dynare does](https://www.dynare.org/wp-repo/dynarewp002.pdf),
 by Sébastien Villemot
 </p>