Fix two descriptions of yeelight actions (#134282)

homeassistant/components/yeelight/strings.json

@@ -59,7 +59,7 @@
   "services": {
     "set_mode": {
       "name": "Set mode",
-      "description": "Sets a operation mode.",
+      "description": "Sets an operation mode.",
       "fields": {
         "mode": {
           "name": "[%key:common::config_flow::data::mode%]",
@@ -129,7 +129,7 @@
     },
     "set_auto_delay_off_scene": {
       "name": "Set auto delay off scene",
-      "description": "Turns the light on to the specified brightness and sets a timer to turn it back off after the given number of minutes. If the light is off, Set a color scene, if light is off, it will be turned on.",
+      "description": "Turns the light on to the specified brightness and sets a timer to turn it back off after the given number of minutes. If the light is off, it will be turned on.",
       "fields": {
         "minutes": {
           "name": "Minutes",
@@ -143,7 +143,7 @@
     },
     "start_flow": {
       "name": "Start flow",
-      "description": "Start a custom flow, using transitions from https://yeelight.readthedocs.io/en/stable/yeelight.html#flow-objects.",
+      "description": "Starts a custom flow, using transitions from https://yeelight.readthedocs.io/en/stable/yeelight.html#flow-objects.",
       "fields": {
         "count": {
           "name": "Count",