fix: revert BOOTSTRAP_VALIDATOR_SS58 to correct SS58 (5GziQCcR...)

Container was running with wrong mnemonic (12-word test key instead of
24-word production key). Now that .env is fixed, the validator hotkey
matches 5GziQCcRpN8NCJktX343brnfuVe3w6gUYieeStXPD1Dag2At again.

Author: echobt

crates/core/src/constants.rs

@@ -86,7 +86,7 @@ pub const BOOTSTRAP_PERIOD_EPOCHS: u64 = 100;
 pub const BOOTSTRAP_END_BLOCK: u64 = 7_681_009;
 
 /// The bootstrap validator hotkey (SS58) that is trusted during bootstrap
-pub const BOOTSTRAP_VALIDATOR_SS58: &str = "5EPCUjPxiHAcNooYipQFWr9NmmXJKpNG5RhcntXwbtUySrgH";
+pub const BOOTSTRAP_VALIDATOR_SS58: &str = "5GziQCcRpN8NCJktX343brnfuVe3w6gUYieeStXPD1Dag2At";
 
 /// Weight assigned to UID 0 during the bootstrap period
 pub const BOOTSTRAP_UID0_WEIGHT: u16 = u16::MAX;