fix(airquality): update the API

#### airquality:v1

The following keys were changed:
- schemas.Concentration.properties.value.description
- schemas.Pollutant.properties.code.description
- schemas.Pollutant.properties.fullName.description

Author: yoshi-automation

discovery/airquality-v1.json

@@ -250,7 +250,7 @@
       }
     }
   },
-  "revision": "20240625",
+  "revision": "20240901",
   "rootUrl": "https://airquality.googleapis.com/",
   "schemas": {
     "AdditionalInfo": {
@@ -350,7 +350,7 @@
           "type": "string"
         },
         "value": {
-          "description": "Value of pollutant concentration.",
+          "description": "Value of the pollutant concentration.",
           "format": "float",
           "type": "number"
         }
@@ -849,7 +849,7 @@
           "description": "Additional information about the pollutant."
         },
         "code": {
-          "description": "The pollutant's code name. For example: \"so2\". A list of all available codes could be found [here](/maps/documentation/air-quality/pollutants#reported_pollutants).",
+          "description": "The pollutant's code name (for example, \"so2\"). For a list of supported pollutant codes, see [Reported pollutants](/maps/documentation/air-quality/pollutants#reported_pollutants).",
           "type": "string"
         },
         "concentration": {
@@ -861,7 +861,7 @@
           "type": "string"
         },
         "fullName": {
-          "description": "The pollutant's full name. For chemical compounds, this is the IUPAC name. Example: \"Sulfur Dioxide\". For more information about the IUPAC names table, see https://iupac.org/what-we-do/periodic-table-of-elements/",
+          "description": "The pollutant's full name. For chemical compounds, this is the IUPAC name. Example: \"Sulfur Dioxide\". For more information about the IUPAC names table, see https://iupac.org/what-we-do/periodic-table-of-elements/.",
           "type": "string"
         }
       },

src/apis/airquality/v1.ts

@@ -206,7 +206,7 @@ export namespace airquality_v1 {
      */
     units?: string | null;
     /**
-     * Value of pollutant concentration.
+     * Value of the pollutant concentration.
      */
     value?: number | null;
   }
@@ -526,7 +526,7 @@ export namespace airquality_v1 {
      */
     additionalInfo?: Schema$AdditionalInfo;
     /**
-     * The pollutant's code name. For example: "so2". A list of all available codes could be found [here](/maps/documentation/air-quality/pollutants#reported_pollutants).
+     * The pollutant's code name (for example, "so2"). For a list of supported pollutant codes, see [Reported pollutants](/maps/documentation/air-quality/pollutants#reported_pollutants).
      */
     code?: string | null;
     /**
@@ -538,7 +538,7 @@ export namespace airquality_v1 {
      */
     displayName?: string | null;
     /**
-     * The pollutant's full name. For chemical compounds, this is the IUPAC name. Example: "Sulfur Dioxide". For more information about the IUPAC names table, see https://iupac.org/what-we-do/periodic-table-of-elements/
+     * The pollutant's full name. For chemical compounds, this is the IUPAC name. Example: "Sulfur Dioxide". For more information about the IUPAC names table, see https://iupac.org/what-we-do/periodic-table-of-elements/.
      */
     fullName?: string | null;
   }