Update build key to "Universal GPG signing key from Nitrokey 3A key"

Signed-off-by: Roy Spliet <[email protected]>

Author: RSpliet

build_installer.sh

@@ -5,7 +5,7 @@ set -o pipefail
 
 DESTDIR="$PWD"
 
-OPENWRT_PGP="0xCD84BCED626471F1"
+OPENWRT_PGP="0x1D53D1877742E911"
 KEYSERVER="keyserver.ubuntu.com"
 INSTALLERDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 OPENWRT_DIR="${INSTALLERDIR}/openwrt-ib"