package/libcurl: bump to version 7.73.0
Cc: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 2d0be6577e8df799f94a900975b1db8f7a5be2d6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>