fix: use git add -f for gitignored spec artifacts in release

[emilyoram]

The release workflow fails at the "Commit generated artifacts" step because external-spec/bundled/ matches the .gitignore pattern external-spec/**/*.

Error:

The following paths are ignored by one of your .gitignore files:
external-spec/bundled
Use -f if you really want to add them.

Fix: Add -f flag to git add so it force-adds the gitignored spec artifacts that the release pipeline intentionally regenerates and commits.

[Copilot]

Pull request overview

Adds -f flag to git add in the release workflow so the intentionally regenerated spec artifacts under external-spec/bundled/ (which match a .gitignore pattern) can be committed by the release pipeline.

Changes:

• Force-add gitignored spec artifacts during the release commit step.

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