chore(deps): bump andstor/file-existence-action action from v2 to v3

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

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

@@ -75,7 +75,7 @@ jobs:
 
       - name: Check composer.json
         id: check_composer
-        uses: andstor/file-existence-action@20b4d2e596410855db8f9ca21e96fbe18e12930b # v2
+        uses: andstor/file-existence-action@076e0072799f4942c8bc574a82233e1e4d13e9d6 # v3
         with:
           files: "${{ env.APP_NAME }}/composer.json"
 
@@ -97,7 +97,7 @@ jobs:
 
       - name: Check Krankerl config
         id: krankerl
-        uses: andstor/file-existence-action@20b4d2e596410855db8f9ca21e96fbe18e12930b # v2
+        uses: andstor/file-existence-action@076e0072799f4942c8bc574a82233e1e4d13e9d6 # v3
         with:
           files: ${{ env.APP_NAME }}/krankerl.toml