[keyring] usign: add 22.03 release build public key

[LEDE Commits]

ynezz pushed a commit to keyring.git, branch master:
https://git.openwrt.org/62471e693b4f9f19dd88afa6827fc3a2cf121d9a

commit 62471e693b4f9f19dd88afa6827fc3a2cf121d9a
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Fri Mar 25 13:59:44 2022 +0100

    usign: add 22.03 release build public key
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 usign/4d017e6f1ed5d616 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usign/4d017e6f1ed5d616 b/usign/4d017e6f1ed5d616
new file mode 100644
index 0000000..eaa4a86
--- /dev/null
+++ b/usign/4d017e6f1ed5d616
@@ -0,0 +1,2 @@
+untrusted comment: Public usign key for 22.03 release builds
+RWRNAX5vHtXWFmt+n5di7XX8rTu0w+c8X7Ihv4oCyD6tzsUwmH0A6kO0