Fix formatting errors from cargo-sort (#7512)

[cargo-sort is currently failing on CI](https://github.com/sigp/lighthouse/actions/runs/15198128212/job/42746931918?pr=7025), likely due to new checks introduced in version [2.0.0](https://github.com/DevinR528/cargo-sort/releases/tag/v2.0.0).


  Fixed the errors by running cargo-sort with formatting enabled.

beacon_node/beacon_chain/Cargo.toml

@@ -5,10 +5,6 @@ authors = ["Paul Hauner <paul@paulhauner.com>", "Age Manning <Age@AgeManning.com
 edition = { workspace = true }
 autotests = false # using a single test binary compiles faster
 
-[[bench]]
-name = "benches"
-harness = false
-
 [features]
 default = ["participation_metrics"]
 write_ssz_files = []  # Writes debugging .ssz files to /tmp during block processing.
@@ -17,11 +13,6 @@ fork_from_env = [] # Initialise the harness chain spec from the FORK_NAME env va
 portable = ["bls/supranational-portable"]
 test_backfill = []
 
-[dev-dependencies]
-criterion = { workspace = true }
-maplit = { workspace = true }
-serde_json = { workspace = true }
-
 [dependencies]
 alloy-primitives = { workspace = true }
 bitvec = { workspace = true }
@@ -75,6 +66,15 @@ tree_hash = { workspace = true }
 tree_hash_derive = { workspace = true }
 types = { workspace = true }
 
+[dev-dependencies]
+criterion = { workspace = true }
+maplit = { workspace = true }
+serde_json = { workspace = true }
+
+[[bench]]
+name = "benches"
+harness = false
+
 [[test]]
 name = "beacon_chain_tests"
 path = "tests/main.rs"