[fix](function) Fix ArrayType.of parameter error in StGeometries

Author: yixuanyxzhu

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/StGeometries.java

@@ -39,7 +39,7 @@ public class StGeometries extends ScalarFunction
         implements UnaryExpression, ExplicitlyCastableSignature, AlwaysNullable, PropagateNullLiteral {
 
     public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
-            FunctionSignature.ret(ArrayType.of(VarcharType.SYSTEM_DEFAULT, true))
+            FunctionSignature.ret(ArrayType.of(VarcharType.SYSTEM_DEFAULT))
                     .args(VarcharType.SYSTEM_DEFAULT)
     );