doc: add YAML metadata for process.memoryUsage.rss

Refs: #34291

PR-URL: #36781
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: Flarna

doc/api/process.md

@@ -1615,6 +1615,9 @@ informations about memory usage which can be slow depending on the
 program memory allocations.
 
 ## `process.memoryUsage.rss()`
+<!-- YAML
+added: REPLACEME
+-->
 
 * Returns: {integer}