package/boost: update download url

boost moved its package hosting from jfrog to their own url
provided by the C++ Alliance. According to [0] the old urls
might cease to exist after December 2024.

[0] https://lists.boost.org/Archives/boost/2024/05/256914.php

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 8d4a9afdd530c4957ce03b156bc6a0bf1b4ca507)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/boost/boost.mk

@@ -6,7 +6,7 @@
 
 BOOST_VERSION = 1.83.0
 BOOST_SOURCE = boost_$(subst .,_,$(BOOST_VERSION)).tar.bz2
-BOOST_SITE = https://boostorg.jfrog.io/artifactory/main/release/$(BOOST_VERSION)/source
+BOOST_SITE = https://archives.boost.io/release/$(BOOST_VERSION)/source
 BOOST_INSTALL_STAGING = YES
 BOOST_LICENSE = BSL-1.0
 BOOST_LICENSE_FILES = LICENSE_1_0.txt