repo: point GitHub links at the CopperlineHQ org

[LinuxJedi]

The project repositories moved from the LinuxJedi user account to the
CopperlineHQ organisation, keeping their names: Copperline,
copperline.github.io and retro32-term. The old paths still redirect,
but the links baked into the repo should name the new owner directly.

What changed

Area	Change
Cargo.toml	repository field
README.md, docs/index.md, docs/myst.yml, docs/guide/getting-started.md	repo and releases links, MyST github: field
Formula/copperline.rb, RELEASE.md	release tarball URL, head URL, tap name -> copperlinehq/copperline/copperline
.github/workflows/homebrew.yml	brew tap / brew audit tap name
.github/workflows/docs-site.yml, wasm-demo.yml	deploy target -> CopperlineHQ/copperline.github.io
packaging/flatpak/*.metainfo.xml, *.yaml	bugtracker, vcs-browser, screenshot raw URLs, commented git source
packaging/windows/README.txt, crates/copperline-web/www/try.js	issue-report URLs
SECURITY.md	private-advisory repo name

Deliberately unchanged

• The copperline.dev domain and the flatpak app ID dev.copperline.Copperline.
• The goatcounter analytics account in docs-site.yml (a personal account, not a GitHub path).
• The author credit in src/video/ui.rs.

Follow-ups outside this repo

• secrets.SITE_DEPLOY_KEY needs to exist on CopperlineHQ/Copperline with its deploy key installed on CopperlineHQ/copperline.github.io, or the docs and wasm deploys fail on the next tag.
• The open Flathub PR (Add dev.copperline.Copperline flathub/flathub#9401) carries its own manifest still pointing at the old repo tarball.

Testing

No code paths read these strings (nothing uses CARGO_PKG_REPOSITORY), so this is docs, packaging metadata and CI configuration only. cargo verify-project passes and the workflow YAML is unchanged apart from the two tap/repository names.

[Copilot]

Pull request overview

Updates hard-coded GitHub repository references across the Copperline repo to point at the new CopperlineHQ organization after the project migration, covering crate metadata, documentation, packaging metadata, and CI workflows.

Changes:

• Updated Cargo.toml repository metadata and various docs/pages to link to https://github.com/CopperlineHQ/Copperline.
• Updated packaging metadata (Flatpak/AppStream, Windows README) and the wasm demo bug-report URL to the new GitHub issue/repo locations.
• Updated CI workflow targets for docs/wasm publishing and adjusted Homebrew-related tap/formula references.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
SECURITY.md	Updates the repository name referenced for GitHub vulnerability reporting.
RELEASE.md	Updates release tarball URL and Homebrew formula references for the migrated org/tap.
README.md	Updates Homebrew tap instructions and releases link to the new org.
packaging/windows/README.txt	Updates bug report URL to the new GitHub issues page.
packaging/flatpak/dev.copperline.Copperline.yaml	Updates the (commented) git URL example to the new org.
packaging/flatpak/dev.copperline.Copperline.metainfo.xml	Updates AppStream URLs and screenshot raw URLs to the new org paths.
Formula/copperline.rb	Updates formula comments and source/head URLs to the new org.
docs/myst.yml	Updates MyST project GitHub URL to the new org.
docs/index.md	Updates docs homepage GitHub link to the new org.
docs/guide/getting-started.md	Updates Homebrew/release links to the new org.
crates/copperline-web/www/try.js	Updates the in-browser demo’s bug report link to the new org issues URL.
Cargo.toml	Updates crate repository field to the new org.
.github/workflows/wasm-demo.yml	Updates the website repo target to CopperlineHQ/copperline.github.io.
.github/workflows/homebrew.yml	Updates tap/audit references to the migrated org/tap.
.github/workflows/docs-site.yml	Updates the website repo target to CopperlineHQ/copperline.github.io.

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