Update doc/api/deprecations.md

Author: jasnell

doc/api/deprecations.md

@@ -3584,7 +3584,7 @@ In a future version of Node.js, [`message.headers`][],
 <!-- YAML
 changes:
   - version: REPLACEME
-    pr-url: https://github.com/nodejs/node/pull/00000
+    pr-url: https://github.com/nodejs/node/pull/58618
     description: End-of-Life.
   - version: v20.0.0
     pr-url: https://github.com/nodejs/node/pull/46432