Resolve CA1835 inspection

"Change the `ReadAsync` method call to use the
`Stream.ReadAsync(Memory<byte>, CancellationToken)` overload"

osu.Game/IO/Archives/ArchiveReader.cs

@@ -41,7 +41,7 @@ public async Task<byte[]> GetAsync(string name)
                     return null;
 
                 byte[] buffer = new byte[input.Length];
-                await input.ReadAsync(buffer, 0, buffer.Length);
+                await input.ReadAsync(buffer);
                 return buffer;
             }
         }