package/sqlite: use SPDX identifier for license

The SPDX identifier for the sqlite license is "blessing":
https://spdx.org/licenses/blessing.html

Signed-off-by: Christian Hitz <christian.hitz@bbv.ch>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit ddd257ca23e6bcf60676bcd292035fe99e6cbf62)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sqlite/sqlite.mk

@@ -8,7 +8,7 @@ SQLITE_VERSION = 3.43.1
 SQLITE_TAR_VERSION = 3430100
 SQLITE_SOURCE = sqlite-autoconf-$(SQLITE_TAR_VERSION).tar.gz
 SQLITE_SITE = https://www.sqlite.org/2023
-SQLITE_LICENSE = Public domain
+SQLITE_LICENSE = blessing
 SQLITE_LICENSE_FILES = tea/license.terms
 SQLITE_CPE_ID_VENDOR = sqlite
 SQLITE_INSTALL_STAGING = YES