Use a different random seed for randomBinaryForm example

Otherwise, we end up calling QEPCAD, which will fail if it's not
available (e.g., on the macOS GitHub builds).

M2/Macaulay2/packages/CoincidentRootLoci/documentation.m2

@@ -330,7 +330,7 @@ randomBinaryForm(d,r,)
 randomBinaryForm(d,,c)", 
 Inputs => {"d" => ZZ,"r" => ZZ,"c" => ZZ}, 
 Outputs => {RingElement => {"a random binary form of degree ",TT"d",", real rank ",TT "r"," and complex rank ",TT "c"}},
-EXAMPLE {"F = randomBinaryForm 5","F = randomBinaryForm(5,4,3)","(realrank F,complexrank F)","F = randomBinaryForm(6,4,4)","(realrank F,complexrank F)",},
+EXAMPLE {"setRandomSeed 2", "F = randomBinaryForm 5","F = randomBinaryForm(5,4,3)","(realrank F,complexrank F)","F = randomBinaryForm(6,4,4)","(realrank F,complexrank F)",},
 SeeAlso => {realrank,complexrank}}
 document { 
 Key => {realroots,(realroots,RingElement)},