fix(cron): enable chrono now feature (#24047)

Author: littledivy

ext/cron/Cargo.toml

@@ -16,7 +16,7 @@ path = "lib.rs"
 [dependencies]
 anyhow.workspace = true
 async-trait.workspace = true
-chrono.workspace = true
+chrono = { workspace = true, features = ["now"] }
 deno_core.workspace = true
 saffron.workspace = true
 tokio.workspace = true