The Retry-After value that is sent and displayed in the header response is not according to the standard regex

Short Description: The Retry-After value that is sent and displayed in the header response is not according to the standard regex. The value should be a "a non-negative decimal integer", i.e., meaning that should be a value written in base 10 and integer (e.g. 45; 8; 90). Currently, we are sending floot values (e.g 0.890) which are decimal but not integer.

Steps to Reproduce:

1 - Sent a Graphlq request, for example, in order to cause a 429 too many requests.

2 - When the response error appears, check the header for the retry-value.

Actual Results: A floot number is displayed (decimal but not integer).

Expected Results: The value should be decimal integer (expressed in base 10 and integer - 45).