doc: add missing deprecation number

PR-URL: #35630
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

doc/api/deprecations.md

@@ -2635,7 +2635,7 @@ Type: Documentation-only
 The [`crypto.Certificate()` constructor][] is deprecated. Use
 [static methods of `crypto.Certificate()`][] instead.
 
-### DEP0XXX: `fs.rmdir(path, { recursive: true })`
+### DEP0147: `fs.rmdir(path, { recursive: true })`
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   - version: REPLACEME