Decreased default buffer size fir TypedSpanList

Author: linkdotnet

src/LinkDotNet.StringBuilder/TypedSpanList.cs

@@ -17,7 +17,7 @@ internal ref struct TypedSpanList<T>
     /// </summary>
     public TypedSpanList()
     {
-        buffer = new T[32];
+        buffer = new T[8];
         count = 0;
     }