openwrt-keyring: add OpenWrt 22.03 GPG/usign keys

 62471e693b4f usign: add 22.03 release build public key
 70817cffc905 gpg: add OpenWrt 22.03 signing key

Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/system/openwrt-keyring/Makefile

@@ -7,9 +7,9 @@ PKG_RELEASE:=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/keyring.git
-PKG_SOURCE_DATE:=2021-02-20
-PKG_SOURCE_VERSION:=49283916005d7868923d34ab34f14188cf74812d
-PKG_MIRROR_HASH:=7b58592bb49e4b37c8e80904c8f457ce3f0f2e6b1d2c473ccfe9204a8b7be831
+PKG_SOURCE_DATE:=2022-03-25
+PKG_SOURCE_VERSION:=62471e693b4f9f19dd88afa6827fc3a2cf121d9a
+PKG_MIRROR_HASH:=9e1c85c83b61c91f467d8df9bdf94e8a94a85ffbddfcbf3b3dc38a56e98e2516
 
 PKG_MAINTAINER:=John Crispin <john@phrozen.org>
 PKG_LICENSE:=GPL-2.0