Include "The Macaulay2 Authors" in citation info

Author: d-torrance

CITATION.cff

@@ -5,6 +5,7 @@ authors:
     given-names: Daniel R.
   - family-names: Stillman
     given-names: Michael E.
+  - name: The Macaulay2 Authors
 title: Macaulay2, a software system for research in algebraic geometry
 url: https://macaulay2.com/
 

M2/Macaulay2/packages/PackageCitations.m2

@@ -209,7 +209,7 @@ iCite String := S -> (
     if S === "M2" then return (
         concatenate (
             "@misc{M2,\n",
-            "  author = {Grayson, Daniel R. and Stillman, Michael E.},\n",
+            "  author = {Grayson, Daniel R. and Stillman, Michael E. and The Macaulay2 Authors},\n",
             "  title = {Macaulay2, a software system for research in algebraic geometry},\n",
             "  howpublished = {Available at ", ///\///, "url{https://macaulay2.com/}}\n",
             "}\n",