fix: appstore update crash and node 20 deprecation warnings

[alaurie]

• Handle HttpException and IOException gracefully in appstore.java to skip catalogs returning HTTP 400 (e.g. malformed spaces in URLs) instead of retrying indefinitely and crashing the action.
• Update isSecondaryRateLimit to isRateLimit for broader rate limit detection.
• Update actions/checkout to v7.0.1 (3d3c42e) and jdx/mise-action to v4.2.5 (3c2e0cf) to resolve Node 20 deprecation warnings and run on Node 24. Pinned to commit hashes to maintain supply chain security policy.

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[alaurie]

Updated .github/appstore.java dependencies to their latest stable non-RC releases and updated deprecated GitHub API handler references:

• Dependency Updates:
  • info.picocli:picocli: 4.5.0 → 4.7.7
  • org.kohsuke:github-api: 1.128 → 1.330
  • com.google.code.gson:gson: 2.8.6 → 2.14.0
  • org.commonmark:commonmark* family: 0.17.1 → 0.30.0
• Deprecation Refactoring:
  • Replaced deprecated AbuseLimitHandler with GitHubAbuseLimitHandler
  • Replaced deprecated RateLimitHandler with GitHubRateLimitHandler

[maxandersen]

the action runs to completion locally with no problem - worth a shot if this can help :)