chore(ci): simplify Crowdin workflow and bump checkout action

- Upgrade `actions/checkout` from v4 → v6 in both upload and download jobs
- Remove manual `bun install` + compile + git commit steps from the download job — Crowdin's own action now handles committing updated PO files via `push_translations: true`
- Allow the download job to run on `schedule` events in addition to `workflow_dispatch`

.github/workflows/crowdin.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'push'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Upload sources to Crowdin
         uses: crowdin/github-action@v2
@@ -35,13 +35,9 @@ jobs:
   download:
     name: Download translations
     runs-on: ubuntu-latest
-    if: github.event_name == 'workflow_dispatch'
+    if: github.event_name == 'workflow_dispatch' || github.event_name == 'schedule'
     steps:
-      - uses: actions/checkout@v4
-
-      - uses: oven-sh/setup-bun@v2
-
-      - run: bun install --frozen-lockfile
+      - uses: actions/checkout@v6
 
       - name: Download translations from Crowdin
         uses: crowdin/github-action@v2
@@ -57,11 +53,3 @@ jobs:
           CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
           CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Commit updated catalogs
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add packages/i18n/src/po/
-          git diff --cached --quiet || git commit -m "chore(i18n): update translation catalogs"
-          git push