chore: use new axum capture pattern

Author: merklefruit

crates/common/src/pbs/constants.rs

@@ -2,7 +2,7 @@ use crate::constants::COMMIT_BOOST_VERSION;
 
 pub const BUILDER_API_PATH: &str = "/eth/v1/builder";
 
-pub const GET_HEADER_PATH: &str = "/header/:slot/:parent_hash/:pubkey";
+pub const GET_HEADER_PATH: &str = "/header/{slot}/{parent_hash}/{pubkey}";
 pub const GET_STATUS_PATH: &str = "/status";
 pub const REGISTER_VALIDATOR_PATH: &str = "/validators";
 pub const SUBMIT_BLOCK_PATH: &str = "/blinded_blocks";