Update the configuration metadata changelog to include properties whose default values have changed

[snicoll]

Changes in projects for certain required elements can lead to change the default value that we expose via configuration properties. Looking at the changelog for the release, these do not show up because they're neither added, removed, or deprecated.

Perhaps a new section at the top that warn users that existing key have changed, and perhaps users should flip the value back, or remove the override they had before.

[mehrdadbozorgmehr]

Can I work on this issue? @snicoll

[snicoll]

Thanks for the offer. If you know what needs to be done, please go ahead and let us know.