[DOC] Fix link in NEWS.md

NEWS.md

@@ -31,7 +31,7 @@ Note: We're only listing outstanding class updates.
 * Exception
 
   * Exception#set_backtrace now accepts arrays of `Thread::Backtrace::Location`.
-    `Kernel#raise`, `Thread#raise` and `Fiber#raise` also accept this new format. [Feature #13557]
+    `Kernel#raise`, `Thread#raise` and `Fiber#raise` also accept this new format. [[Feature #13557]]
 
 ## Stdlib updates
 
@@ -109,6 +109,7 @@ See GitHub releases like [GitHub Releases of Logger](https://github.com/ruby/log
 
 ## JIT
 
+[Feature #13557]: https://bugs.ruby-lang.org/issues/13557
 [Feature #16495]: https://bugs.ruby-lang.org/issues/16495
 [Feature #18980]: https://bugs.ruby-lang.org/issues/18980
 [Feature #19117]: https://bugs.ruby-lang.org/issues/19117