libubox: update to Git HEAD (2026-03-13)

815633847cd3 CMakeLists.txt: remove -Werror=format-nonliteral

Signed-off-by: Hauke Mehrtens <[email protected]>

package/libs/libubox/Makefile

@@ -5,9 +5,9 @@ PKG_RELEASE=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/libubox.git
-PKG_MIRROR_HASH:=fb43a86d13bbbf16d47358caa2fe7eec3b802e3a57ba5142520add159469c927
-PKG_SOURCE_DATE:=2026-02-13
-PKG_SOURCE_VERSION:=1aa36ee774c8db4d7a396903e0d2e1fb79ee8bf1
+PKG_MIRROR_HASH:=55b2298ea74bb4c7267e4b615d442aeff601e0de88ec0e641e4c40eed8454e85
+PKG_SOURCE_DATE:=2026-03-13
+PKG_SOURCE_VERSION:=815633847cd32ffe6da28943cbeb37edc88265c8
 PKG_ABI_VERSION:=$(call abi_version_str,$(PKG_SOURCE_DATE))
 CMAKE_INSTALL:=1