Fix citation details (#524)

Author: kss682

_plugins/googlescholar.rb

@@ -6,8 +6,8 @@
 
 module Jekyll
   class ScholarStats < Generator
-    # ID for Bungartz et al. paper
-    CITATION_ID = '5053469347483527186'.freeze
+    # ID for PreCICE v2 paper
+    CITATION_ID = '17974677460269868025'.freeze
     SCHOLAR_URL = 'http://scholar.google.com/scholar?hl=en&cites='.freeze
     def generate(site)
       begin

pages/index.html

@@ -311,7 +311,7 @@ <h2 class="section-header">Academic at heart, 100% free software</h2>
             <a href="assets/precice-v2.bib">Download BibTeX &nbsp;<i class="fas fa-download"></i></a>
           </div>
         </div>
-        <a href="https://scholar.google.com/scholar?hl=en&cites={{ site.data.scholar.id }}" class="btn btn-default no-icon literature-link" role="button">Citations of preCICE v1 paper {% if site.data.scholar.citations %}({{ site.data.scholar.citations }}){% else %}({{ site.precice_citations }}){% endif %} &nbsp;<i class="fas fa-chevron-right"></i></a>
+        <a href="https://scholar.google.com/scholar?hl=en&cites={{ site.data.scholar.id }}" class="btn btn-default no-icon literature-link" role="button">Citations of preCICE v2 paper {% if site.data.scholar.citations %}({{ site.data.scholar.citations }}){% else %}({{ site.precice_citations }}){% endif %} &nbsp;<i class="fas fa-chevron-right"></i></a>
         <a href="fundamentals-literature-guide.html" class="btn btn-primary literature-link" role="button">Literature guide &nbsp;<i class="fas fa-chevron-right"></i></a>
       </div>
     </div>