Update helper text for PF app - S3->region field (#660)

.changeset/eighty-boxes-exist.md

@@ -0,0 +1,5 @@
+---
+"saleor-app-products-feed": minor
+---
+
+Improved helper text in S3 form - region field. Now it should be more explicit that only region code (like "eu-west-1") should be provided.

apps/products-feed/src/modules/app-configuration/s3-configuration-form.tsx

@@ -44,7 +44,14 @@ export const S3ConfigurationForm = (props: Props) => {
 
       <Input size={"small"} name={"bucketName"} control={control} label="Bucket name" />
 
-      <Input size={"small"} name={"region"} control={control} label="Bucket region" />
+      <Input
+        size={"small"}
+        name={"region"}
+        control={control}
+        label="Bucket region"
+        helperText={"Use the region code, e.g. 'eu-west-1'"}
+        placeholder={"eu-west-1"}
+      />
 
       <Button type="submit" variant="primary" alignSelf={"end"}>
         Save bucket configuration