Update grattan.cls

Added Summer Foundation to list of Endowment Supports
Removed duplication of donors across categories of support
Removed Origin Energy

All per email from Alan in early March 2024

grattan.cls

@@ -703,7 +703,7 @@ numbers=noenddot,
   \begin{multicols}{2}
   \setlength{\parskip}{4pt plus 8pt minus 5pt}
   \textbf{\textcolor{theGrey}{\normalsize Founding members (2009)}}\hfill\par
-  \vspace{-40pt} 
+  % \vspace{-40pt} 
   {\centering  
 
   \IfFileExists{aus-gov-logo-stacked-black.pdf}%
@@ -736,18 +736,14 @@ numbers=noenddot,
   National Australia Bank
 
   Scanlon Foundation
-
+
+  Summer Foundation 
+
   Susan McKinnon Foundation
 
   \vspace{8pt}
 
   \textbf{\textcolor{theGrey}{\normalsize Affiliate Partners}}
-
-  Origin Energy Foundation
-
-  Scanlon Foundation
-
-  Susan McKinnon Foundation
 
   Third Link Growth Fund
 
@@ -759,6 +755,8 @@ numbers=noenddot,
 
   Medibank Private
 
+  Origin Energy Foundation
+
   Trawalla Foundation
 
   Wesfarmers