Fix strings related to Google search tool in Google AI (home-assistant#145480)

Author: tronikos

homeassistant/components/google_generative_ai_conversation/strings.json

@@ -41,12 +41,12 @@
         },
         "data_description": {
           "prompt": "Instruct how the LLM should respond. This can be a template.",
-          "enable_google_search_tool": "Only works with \"No control\" in the \"Control Home Assistant\" setting. See docs for a workaround using it with \"Assist\"."
+          "enable_google_search_tool": "Only works if there is nothing selected in the \"Control Home Assistant\" setting. See docs for a workaround using it with \"Assist\"."
         }
       }
     },
     "error": {
-      "invalid_google_search_option": "Google Search cannot be enabled alongside any Assist capability, this can only be used when Assist is set to \"No control\"."
+      "invalid_google_search_option": "Google Search can only be enabled if nothing is selected in the \"Control Home Assistant\" setting."
     }
   },
   "services": {