fix: small comment update (#2304)

The comment talked about the server hanging up while
the response was being read.

The server hanging up while the response is read should not
be a problem. The client will still read whatever the server
has sent before getting to the fin/rst that closes the connection.

This error should only (I think) happen if the server hangs up
before sending a complete response or if the server sends an
invalid response.

Co-authored-by: John DiSanti <jdisanti@amazon.com>
Co-authored-by: Zelda Hessler <zhessler@amazon.com>