doc: reference pr url

Author: Xstoudi

doc/api/process.md

@@ -2864,7 +2864,7 @@ console.log(memoryUsage.rss());
 added: v0.5.3
 changes:
   - version: REPLACEME
-    pr-url: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/61276
     description: Make `moduleLoadList` immutable.
 -->