ci: point package check at apify/actions feature branch

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: vdusek

.github/workflows/_check_package.yaml

@@ -27,10 +27,9 @@ jobs:
         run: uv run poe build
 
       - name: Verify built package
-        uses: apify/workflows/python-package-check@main
+        uses: apify/actions/python-package-check@feat/python-package-check-action
         with:
           package_name: apify_shared
-          src_package_dir: src/apify_shared
           dist_dir: dist
           python_version: "3.14"
           smoke_code: |

.github/workflows/manual_release_beta.yaml

@@ -61,10 +61,9 @@ jobs:
           ref: ${{ needs.changelog_update.outputs.changelog_commitish }}
 
       - name: Verify built package
-        uses: apify/workflows/python-package-check@main
+        uses: apify/actions/python-package-check@feat/python-package-check-action
         with:
           package_name: apify_shared
-          src_package_dir: src/apify_shared
           dist_dir: dist
           python_version: "3.14"
           smoke_code: |

.github/workflows/manual_release_stable.yaml

@@ -96,10 +96,9 @@ jobs:
           ref: ${{ needs.changelog_update.outputs.changelog_commitish }}
 
       - name: Verify built package
-        uses: apify/workflows/python-package-check@main
+        uses: apify/actions/python-package-check@feat/python-package-check-action
         with:
           package_name: apify_shared
-          src_package_dir: src/apify_shared
           dist_dir: dist
           python_version: "3.14"
           smoke_code: |