Re-check .github/actionlint.yaml's workflow_repository/sha ignore after bumping baseline past v0.13.1

[ineedjet]

Problem

.github/actionlint.yaml in this repo carries a repo-local ignore for
deploy-shared.yml:

paths:
  .github/workflows/deploy-shared.yml:
    # actionlint 1.7.12 predates these GitHub job context properties.
    ignore:
      - 'property "workflow_(repository|sha)" is not defined in object type'

This exists because actionlint doesn't yet understand
job.workflow_repository/job.workflow_sha, the newer GitHub Actions
context properties deploy-shared.yml relies on (used to self-checkout the
correct repo/ref inside a reusable workflow). Baseline's own
hooks/actionlint.sh carries the equivalent -ignore flags for the same
gap, plus two more for the $/... self-reference convention used
throughout this repo's workflows (Copilot's automated review on #102 flagged
those $/... references as invalid — false positive, same root cause: the
reviewing tool doesn't know about this newer GitHub Actions behavior
either).

Baseline released
v0.13.1
("ignore unsupported reusable workflow context") while this PR was still
open — this repo is still pinned to v0.13.0 in lint.yml, embedder.yml,
github.yml, and notify-telegram-pr.yml.

Proposed change

Once this repo bumps its rubykatzen/baseline@vX pin past v0.13.1 (likely
via the existing Dependabot flow), re-check whether v0.13.1 actually changed
actionlint's handling of workflow_repository/workflow_sha (upgraded
actionlint version, or adjusted ignore list). If it did, drop the
now-redundant ignore block from this repo's own .github/actionlint.yaml.

Related

Surfaced while triaging Copilot's automated review on #102.