Apply suggestions from code review

Co-authored-by: Fredrik Adelöw <freben@gmail.com>

.changeset/heavy-owls-float.md

@@ -3,7 +3,7 @@
 '@backstage/plugin-techdocs': patch
 ---
 
-Google Cloud authentication in TechDocs has been improved. https://github.com/backstage/backstage/pull/3981
+Google Cloud authentication in TechDocs has been improved.
 
 `techdocs.publisher.googleGcs.credentials` is now optional. If it is missing, `GOOGLE_APPLICATION_CREDENTIALS`
 environment variable (and some other methods) will be used to authenticate.

docs/features/techdocs/using-cloud-storage.md

@@ -180,7 +180,7 @@ In the IAM console, do the following:
 **2.2 Attach policies**
 
 Remember that you can use Bucket policy **or** User policy. Just make sure that
-you grant all the permissions to the TechDocs user: `3:PutObject`,
+you grant all the permissions to the TechDocs user: `s3:PutObject`,
 `s3:GetObject`, `s3:ListBucket` and `s3:GetBucketLocation`.
 
 **2.2.1 Create the bucket policy**

packages/techdocs-common/src/stages/publish/googleStorage.ts

@@ -72,7 +72,7 @@ export class GoogleGCSPublish implements PublisherBase {
       logger.error(
         `Could not retrieve metadata about the GCS bucket ${bucketName}. ` +
           'Make sure the bucket exists. Also make sure that authentication is setup either by explicitly defining ' +
-          'techdocs.publisher.googleGcs.credentials in app config or by using environment variables' +
+          'techdocs.publisher.googleGcs.credentials in app config or by using environment variables. ' +
           'Refer to https://backstage.io/docs/features/techdocs/using-cloud-storage',
       );
       throw new Error(err.message);