GHA: Test gen downloads page on Akamai

.github/workflows/gen-nighly-downloads.yml

@@ -36,7 +36,17 @@ jobs:
           echo '</ul>' >> $downloads_html
           cat ./$downloads_html
           aws s3 mv ./$downloads_html s3://tools-spring-io/snapshot/STS4/ --dryrun
-          aws s3 ls ${s3_url}
-
+          files=`aws s3 ls ${s3_url}`
+          for file in $files
+          do
+            echo "file: ${file}"
+            url="${s3_url}${file}"
+            echo "url: ${url}"
+            if [[ "$file" =~ ^"s3://tools-spring-io" ]]; then
+              download_url=https://cdn.spring.io/spring-tools${file:20}
+              filename=${file:${#s3_url}}
+              echo '  <li><a href="'${download_url}'">'${filename}'</li>' >> $downloads_html  
+            fi
+          done