chore: replace git dev dep with released dep

Author: ananas-block

Cargo.lock

@@ -131,7 +131,7 @@ rust-s3 = "0.34.0"
 [dev-dependencies]
 function_name = "0.3.0"
 serial_test = "2.0.0"
-light-merkle-tree-reference = { git = "https://github.com/Lightprotocol/light-protocol", rev = "a16015358aee65da5f67e4ae73197df5e75495d9" }
+light-merkle-tree-reference = "2.0.0"
 
 [profile.dev]
 # Do not produce debug info for ~40% faster incremental compilation.