package/delve: bump to version 1.20.0
https://github.com/go-delve/delve/blob/master/CHANGELOG.md#1200-2022-12-07
https://github.com/go-delve/delve/releases/tag/v1.20.0
Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>