Add missing timer service translation (#100388)

homeassistant/components/timer/services.yaml

@@ -36,3 +36,5 @@ change:
       example: "00:01:00, 60 or -60"
       selector:
         text:
+
+reload:

homeassistant/components/timer/strings.json

@@ -62,6 +62,10 @@
           "description": "Duration to add or subtract to the running timer."
         }
       }
+    },
+    "reload": {
+      "name": "[%key:common::action::reload%]",
+      "description": "Reloads helpers from the YAML-configuration."
     }
   }
 }