Request: format ChangeLog so it's parser friendly for downstream maintainers

Currently it's difficult to parse the ChangeLog and easily ascertain what versions are realeased and which are in development.

In the above screenshot (b113594e) we see 3 different entries. For simplicity sake, would it be possible to just have the following format:

siril $version ($date)

siril 1.2.0 (9-15-2023)

where $date = (xx-xx-xxxx) (instead of xx/xx/xx since slashes need to be escaped)

Then a simple regex rule to parse out $version and $date this would look like:

/^siril ([\d.]+) \([\d-]+)\)/

TIA for your cosideration!