fix(gh-workflows): exempt upstream-sync PR titles from Conventional Commits gate

[mateo-di]

Relevant issues

Linear ticket

Pre-Submission checklist

Please complete all items before asking a LiteLLM maintainer to review your PR

• I have added meaningful tests
• My PR passes all CI/CD checks (e.g., lint, format, unit tests)
• My PR's scope is as isolated as possible; it only solves 1 specific problem
• I have requested a Greptile review by commenting @greptileai and received a Confidence Score of at least 4/5 before requesting a maintainer review

Delays in PR merge?

If you're seeing a delay in your PR being merged, ping the LiteLLM Team on Slack (#pr-review).

Screenshots / Proof of Fix

PR #128 ("Upstream Sync: LiteLLM v1.95.0") failed the "Validate PR title" check because its auto-generated title has no Conventional Commits prefix. Its predecessor, PR #121, only passed because the ignore-semantic-pull-request label was added to it by hand twelve hours after creation:

$ gh api repos/CartoDB/litellm/issues/121/timeline --paginate -q '.[] | select(.event=="labeled") | "\(.created_at) \(.actor.login) added \(.label.name)"'
2026-07-13T14:21:56Z Cartofante added upstream-sync
2026-07-13T14:21:57Z Cartofante added automated
2026-07-14T02:34:07Z mateo-di added ignore-semantic-pull-request

carto-upstream-sync-main.yml never applied that label itself, so every future sync PR would repeat this failure without manual intervention. This PR adds the label to LABEL_ARGS at PR-creation time.

Not a testable code path (bash inside a GitHub Actions step); validated by reading conventional-commits.yml's ignoreLabels config and PR #121's label history above, and by parsing the edited YAML with python3 -c "import yaml; yaml.safe_load(...)". Applied ignore-semantic-pull-request to PR #128 by hand as an immediate unblock; this PR prevents the recurrence.

Type

🚄 Infrastructure

Changes

carto-upstream-sync-main.yml: always add the ignore-semantic-pull-request label when creating an upstream-sync PR, since its title format never matches Conventional Commits.