[TEST] version guard for reload rest-api-spec

Relates #32990

Author: albertzaharovits

rest-api-spec/src/main/resources/rest-api-spec/test/nodes.reload_secure_settings/10_basic.yml

@@ -1,5 +1,8 @@
 ---
 "node_reload_secure_settings test":
+  - skip:
+      version: " - 6.3.99"
+      reason: "reload API available 6.4.0 onwards"
 
   - do:
       nodes.reload_secure_settings: {}