Docs: Update broken link for Random.secure

Closes https://github.com/dart-lang/sdk/pull/49682

GitOrigin-RevId: 0a049389dd422e646036232282bbb23ea3bc805e
Change-Id: I39da72e4adb8365a608d53117c146d85ab459bcb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/255381
Reviewed-by: Lasse Nielsen <lrn@google.com>
Commit-Queue: Lasse Nielsen <lrn@google.com>
diff --git a/sdk/lib/math/random.dart b/sdk/lib/math/random.dart
index 35fdd14..33d0cdf 100644
--- a/sdk/lib/math/random.dart
+++ b/sdk/lib/math/random.dart
@@ -9,7 +9,7 @@
 /// The default implementation supplies a stream of pseudo-random bits that are
 /// not suitable for cryptographic purposes.
 ///
-/// Use the [Random.secure]() constructor for cryptographic purposes.
+/// Use the [Random.secure] constructor for cryptographic purposes.
 ///
 /// To create a non-negative random integer uniformly distributed in the range
 /// from 0, inclusive, to max, exclusive, use [nextInt(int max)].