add BR2_PACKAGE_ZSTD to fix further Zoom v7/Qt6 execution errors.

Author: jens-maus

buildroot-external/Buildroot.config

@@ -27,6 +27,7 @@ BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF=y
 
 # Buildroot packages
 BR2_PACKAGE_XZ=y
+BR2_PACKAGE_ZSTD=y
 BR2_PACKAGE_KMOD_TOOLS=y
 BR2_PACKAGE_HOST_KMOD_XZ=y
 BR2_PACKAGE_BUSYBOX_CONFIG="$(BR2_EXTERNAL_THINROOT_PATH)/Busybox.config"