doc: use correct dash in stability status

All other stability statuses use `-`, this one uses `–`. This commit removes the inconsistency. PR-URL: #55200 Reviewed-By: Moshe Atlow <moshe@atlow.co.il> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Debadree Chatterjee <debadree333@gmail.com>

Author: aduh95

doc/api/fs.md

@@ -6810,7 +6810,7 @@ added:
  - v18.20.0
 -->
 
-> Stability: 1 – Experimental
+> Stability: 1 - Experimental
 
 * {string}