Update deprecated.json

Add rule "access=customer#2 to replace by "access=customers" see issue #7831

data/deprecated.json

@@ -7,6 +7,10 @@
     "old": {"aeroway": "aerobridge"},
     "replace": {"aeroway": "jet_bridge", "highway": "corridor"}
   },
+  {
+    "old": {"access": "customer"},
+    "replace": {"access": "customers"}
+  },
   {
     "old": {"access": "public"},
     "replace": {"access": "yes"}