Use the same public bootloader key as before

targets/stm32l432/bootloader/pubkey_bootloader.c

@@ -1,3 +1,6 @@
 #include "stdint.h"
 
-uint8_t *pubkey_boot = (uint8_t *) "\x7b\x2a\x9c\xf8\x21\xf6\x91\x40\x9d\x6c\x42\xe1\xbb\xa1\x31\x82\x6c\x25\x39\x31\x5b\x59\x3c\x8e\x07\x8d\xfa\x0a\x3d\x21\x35\x6f\x58\x81\x4c\xf6\xd8\xf5\x6e\x6f\x62\xc8\x32\xd3\x13\x6f\xe1\xd6\x2d\x81\x52\xbf\x5f\x9e\xa9\x29\xc9\x9d\x9e\x2c\x89\x5f\x1b\x68";
+uint8_t * pubkey_boot = (uint8_t*)"\xd2\xa4\x2f\x8f\xb2\x31\x1c\xc1\xf7\x0c\x7e\x64\x32\xfb\xbb\xb4\xa3\xdd\x32\x20"
+                        "\x0f\x1b\x88\x9c\xda\x62\xc2\x83\x25\x93\xdd\xb8\x75\x9d\xf9\x86\xee\x03\x6c\xce"
+                        "\x34\x47\x71\x36\xb3\xb2\xad\x6d\x12\xb7\xbe\x49\x3e\x20\xa4\x61\xac\xc7\x71\xc7"
+                        "\x1f\xa8\x14\xf2";