slightly fix service account doc

Author: williamstein

src/packages/util/db-schema/site-settings-extras.ts

@@ -822,7 +822,7 @@ export const EXTRAS: SettingsExtras = {
   //   },
   google_cloud_service_account_json: {
     name: "Compute Servers: Google Cloud - Service Account Json",
-    desc: 'Your Google Cloud Service Account created at https://console.cloud.google.com/iam-admin/serviceaccounts with permission to manipulate virtual machines.  This supports managing compute servers on Google Cloud, and you must (1) [enable the Compute Engine API](https://console.cloud.google.com/apis/library/compute.googleapis.com) and [the Monitoring API](https://console.cloud.google.com/apis/library/monitoring.googleapis.com) for this Google Cloud project.  This is a multiline json file that looks like\n\n```js\n{"type": "service_account",...,"universe_domain": "googleapis.com"}\n```',
+    desc: 'A Google Cloud [Service Account](https://console.cloud.google.com/iam-admin/serviceaccounts) with the following IAM Roles: "Editor" (for compute servers) AND "Project IAM Admin" (for cloud filesystem).  This supports managing compute servers on Google Cloud, and you must (1) [enable the Compute Engine API](https://console.cloud.google.com/apis/library/compute.googleapis.com) and [the Monitoring API](https://console.cloud.google.com/apis/library/monitoring.googleapis.com) for this Google Cloud project.  This is a multiline json file that looks like\n\n```js\n{"type": "service_account",...,"universe_domain": "googleapis.com"}\n```',
     default: "",
     multiline: 5,
     password: true,