doc: use REPLACEME for remaining mkdtemp versions

Author: hamidrezaghavami

doc/api/fs.md

@@ -3981,7 +3981,7 @@ See the POSIX mkdir(2) documentation for more details.
 <!-- YAML
 added: v5.10.0
 changes:
-  - version: v24.4.0
+  - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/64397
     description: The `encoding` option now defaults to `'buffer'` if `prefix` is a `Buffer`.
   - version:
@@ -6496,7 +6496,7 @@ See the POSIX mkdir(2) documentation for more details.
 <!-- YAML
 added: v5.10.0
 changes:
-  - version: v24.4.0
+  - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/64397
     description: The `encoding` option now defaults to `'buffer'` if `prefix` is a `Buffer`.
   - version: