refactor: expand endSize

Author: IgorErin

tests/GraphBLAS-sharp.Tests/Matrix/SpGeMM/Expand.fs

@@ -23,7 +23,7 @@ let processor = Context.defaultContext.Queue
 let config =
     { Utils.defaultConfig with
           arbitrary = [ typeof<Generators.PairOfMatricesOfCompatibleSize> ]
-          endSize = 500
+          endSize = 100
           maxTest = 100 }
 
 let createCSRMatrix array isZero =