bump str0m to 0.21.0

Author: lherman-cs

Cargo.lock

@@ -30,7 +30,7 @@ rand = "0.10.1"
 serde = { version = "1", features = ["derive"] }
 # str0m = { git = "https://github.com/PulseBeamDev/str0m.git", branch = "patch/abs-capture-time" }
 # str0m = { git = "https://github.com/algesten/str0m.git", rev = "fbbbde3" }
-str0m = { version = "0.20.0" }
+str0m = { version = "0.21.0" }
 # str0m = { path = "../str0m" }
 thiserror = "2.0"
 tokio = { version = "1", features = ["full", "test-util", "tracing"] }