appstore-update action crashes on catalog paths containing spaces

[alaurie]

Describe the Bug

The daily appstore-update.yml workflow fails when processing catalog entries whose file paths contain spaces (for example: Gonzivang/SecondTry/CodeResources/Apache Camel/camel-main/jbang-catalog.json).

Root Cause

1. Unencoded URL in github-api: When GHContent.read() is called on search results, the underlying library attempts to refresh the content URL
   (https://api.github.com/repositories/.../contents/CodeResources/Apache Camel/...). The unencoded space triggers a URISyntaxException: Illegal character in path, which is wrapped in an
   org.kohsuke.github.HttpException with response code -1.
2. Unhandled -1 HTTP status in retry loop: The error handler in appstore.java only skips known status codes (400, 404, 422, 451, 403). Because response code -1 is not skipped, the script
   treats it as a transient rate-limit error, exhausts 5 retries (sleeping 1 minute per retry), and finally re-throws the exception, terminating the action with a failure.

Stack Trace

org.kohsuke.github.HttpException: Server returned HTTP response code: -1, message: 'null' for URL: https://api.github.com/repositories/747354479/contents/CodeResources/Apache
Camel/camel-main/jbang-catalog.json?ref=...
Caused by: java.io.IOException: Invalid URL
Caused by: java.net.URISyntaxException: Illegal character in path at index 75: https://api.github.com/repositories/747354479/contents/CodeResources/Apache Camel/camel-main/jbang-catalog.json?ref=...