ci: unify auto-update PR title and description format (#1213)

Brings the PRs opened by the `Regenerate models` workflow to the same
format as the matching workflows in apify-client-js and crawlee-python.

- Titles follow `chore: <Verb> <object>`.
- Descriptions are short bullet lists wrapped at 72 columns, so the
squash commit body reads well in `git log`. No blockquotes.
- A footer names the workflow and links its run.

*✍️ Drafted by Claude Code*

Author: vdusek

.github/workflows/on_schedule_regenerate_models.yaml

@@ -160,7 +160,8 @@ jobs:
         if: steps.commit.outputs.committed == 'true'
         env:
           GH_TOKEN: ${{ secrets.APIFY_SERVICE_ACCOUNT_GITHUB_TOKEN }}
-          WORKFLOW_URL: ${{ github.server_url }}/${{ github.repository }}/actions/workflows/on_schedule_regenerate_models.yaml
+          WORKFLOW_NAME: ${{ github.workflow }}
+          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
           PREVIOUS_SPEC_VERSION: ${{ steps.previous-spec.outputs.version }}
         run: |
           SPEC_VERSION=$(uv run python -m scripts.openapi_spec recorded-version)
@@ -169,19 +170,19 @@ jobs:
           # `components/version.yaml` in a follow-up `[skip ci]` commit and a deploy can publish new content under
           # the old stamp. Say which case this is instead of letting the reviewer read it as a content identity.
           if [[ "$SPEC_VERSION" == "$PREVIOUS_SPEC_VERSION" ]]; then
-            SPEC_LINE="- Specification version: \`${SPEC_VERSION}\` - **unchanged**, which doesn't rule out a specification change: the published stamp can lag its content by a deploy. Only the diff tells."
+            SPEC_LINE="- Spec version: \`${SPEC_VERSION}\` (unchanged, but it can lag)."
           else
-            SPEC_LINE="- Specification version: \`${PREVIOUS_SPEC_VERSION}\` -> \`${SPEC_VERSION}\`."
+            SPEC_LINE="- Spec version: \`${PREVIOUS_SPEC_VERSION}\` -> \`${SPEC_VERSION}\`."
           fi
 
           BODY=$(printf '%s\n' \
-            "- Regenerates the Pydantic models, TypedDicts, and literal aliases from the [published OpenAPI specification](https://docs.apify.com/api/openapi.json), and records its version in \`pyproject.toml\`." \
+            "- Regenerate Pydantic models, TypedDicts and literal aliases from the" \
+            "  published OpenAPI spec." \
             "${SPEC_LINE}" \
+            "- Retitle to \`fix:\` or \`feat:\` if the diff is user-facing." \
             "" \
-            "> [!IMPORTANT]" \
-            "> Retitle this pull request to \`fix:\` or \`feat:\` when the diff is user-facing, so that it lands in the changelog and triggers a release - \`chore:\` does neither." \
-            "" \
-            "> Generated by the [Regenerate models](${WORKFLOW_URL}) workflow.")
+            "Generated by the \"${WORKFLOW_NAME}\" workflow:" \
+            "${RUN_URL}")
 
           gh pr create \
             --title "$PR_TITLE" \