message: subscriber: fix broken link in Targets rustdoc
  The link `[global]` is defined at the bottom (and already used in line
  32), so I used it here as well
diff: @@ -111,7 +111,7 @@ use tracing_core::{Collect, Interest, Level, Metadata};
  /// by the user at runtime.
  ///
  /// The `Targets` filter can be used as a [per-subscriber filter][plf] *and* as a
  -/// [global filter]:
  +/// [global filter][global]:
  ///
  /// ```rust
  /// use tracing_subscriber::{
  