Fix Sparkle submodule URL: SSH → HTTPS for public access

[Copilot]

Cloning with --recurse-submodules fails for fork contributors because the Sparkle submodule uses an SSH URL pointing to a private-access GitLab repo.

Change

• .gitmodules: Update Sparkle submodule URL from SSH to HTTPS

-url=git@gitlab.com:overtake/Sparkle.git
+url=https://gitlab.com/overtake/Sparkle.git

The GitLab repo is public; the SSH protocol was the barrier. Submodule commit pointer is unchanged, so no build impact.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/sparkle-project/Sparkle/commits/8f7d1385ea7fd796a028bf116b867191586e0d86
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

I can't pull my fork due to a issue with https://github.com/sparkle-project/Sparkle

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