Bump andstor/file-existence-action from 1 to 2

Bumps [andstor/file-existence-action](https://github.com/andstor/file-existence-action) from 1 to 2.
- [Release notes](https://github.com/andstor/file-existence-action/releases)
- [Commits](https://github.com/andstor/file-existence-action/compare/v1...v2)

---
updated-dependencies:
- dependency-name: andstor/file-existence-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/appstore-build-publish.yml

@@ -73,7 +73,7 @@ jobs:
 
       - name: Check composer.json
         id: check_composer
-        uses: andstor/file-existence-action@v1
+        uses: andstor/file-existence-action@v2
         with:
           files: "${{ env.APP_NAME }}/composer.json"
 
@@ -93,7 +93,7 @@ jobs:
 
       - name: Check Krankerl config
         id: krankerl
-        uses: andstor/file-existence-action@v1
+        uses: andstor/file-existence-action@v2
         with:
           files: ${{ env.APP_NAME }}/krankerl.toml