Added comments for #pragma warning disable items

Author: Sergio0694

Microsoft.Toolkit.HighPerformance/Buffers/ArrayPoolBufferWriter{T}.cs

@@ -41,7 +41,7 @@ public sealed class ArrayPoolBufferWriter<T> : IBuffer<T>, IMemoryOwner<T>
         /// </summary>
         private T[]? array;
 
-#pragma warning disable IDE0032
+#pragma warning disable IDE0032 // Use field over auto-property (clearer and faster)
         /// <summary>
         /// The starting offset within <see cref="array"/>.
         /// </summary>

Microsoft.Toolkit.HighPerformance/Buffers/MemoryBufferWriter{T}.cs

@@ -32,7 +32,7 @@ public sealed class MemoryBufferWriter<T> : IBuffer<T>
         /// </summary>
         private readonly Memory<T> memory;
 
-#pragma warning disable IDE0032
+#pragma warning disable IDE0032 // Use field over auto-property (like in ArrayPoolBufferWriter<T>)
         /// <summary>
         /// The starting offset within <see cref="memory"/>.
         /// </summary>