Define default date after which to collect PRs
PRs are now collected starting at the time of last modification of the output file. In the past, if a meeting happened on March 1st, then
using ./generator.sh "01.03.2024"
would include PRs from March 2nd on
typing ./generator.sh "02.03.2024"
would omit PRs that happened on March 1st after the list was generated.
Edited by Fabrice Lecuyer