Doc: fix outdated protocol version.
In the description of StartupMessage, the protocol version was left
3.0. Instead of just updating it, this commit removes the hard coded
protocol version and shows the numbers as an example. This makes that
the part of the doc does not need to be updated when th
Doc: fix outdated protocol version.
In the description of StartupMessage, the protocol version was left
3.0. This commit updates it to 3.2.
Author: Tatsuo Ishii
Reviewed-by: Jelte Fennema-Nio
Discussion:
https://postgr.es/m/20250626.155608.568829483879866256.ishii%40postgresql.org
Branch
