Adds new integration [eladnahum5/ha-vouchervault] (#6517)

Co-authored-by: Franck Nijhof <git@frenck.dev>

Author: eladnahum5

integration

@@ -671,6 +671,7 @@
   "elad-bar/ha-edgeos",
   "elad-bar/ha-hpprinter",
   "elad-bar/ha-shinobi",
+  "eladnahum5/ha-vouchervault",
   "elahd/ha-cyclepay",
   "elahd/ha-nyc311",
   "elboletaire/ha-weatherxm",