Update geochimica-et-cosmochimica-acta.csl (#5231)

Added collapsed citations

Author: martinvoigt

geochimica-et-cosmochimica-acta.csl

@@ -112,7 +112,7 @@
       <text variable="page"/>
     </group>
   </macro>
-  <citation and="text" et-al-min="3" et-al-use-first="1" disambiguate-add-year-suffix="true" disambiguate-add-names="false" disambiguate-add-givenname="true">
+  <citation and="text" et-al-min="3" et-al-use-first="1" disambiguate-add-year-suffix="true" disambiguate-add-names="false" disambiguate-add-givenname="true" cite-group-delimiter=", " collapse="year-suffix" year-suffix-delimiter=",">
     <sort>
       <key variable="issued"/>
       <key macro="author-short"/>