mctp-estack: Update embassy-sync to 0.7

This provides a Sync+Send bound for zerocopy_channel::Channel used by
Router. Otherwise Router can't be used with non-local executors.

Signed-off-by: Matt Johnston <[email protected]>

Author: mkj

Cargo.lock

@@ -16,7 +16,7 @@ log = { version = "0.4", optional = true }
 crc = "3"
 embedded-io-async = { workspace = true }
 defmt = { workspace = true, optional = true }
-embassy-sync = "0.6"
+embassy-sync = "0.7"
 smbus-pec = { version = "1.0", features = ["lookup-table"] }
 uuid = { version = "1.16.0", default-features = false }