Add scoped-tls to [workspace.dependencies].

Author: nnethercote

rustc_public/Cargo.toml

@@ -12,7 +12,7 @@ rustc_public_bridge = { path = "../rustc_public_bridge" }
 rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
-scoped-tls = "1.0"
+scoped-tls.workspace = true
 serde = { version = "1.0.125", features = [ "derive" ] }
 tracing.workspace = true
 # tidy-alphabetical-end