fix(ci): use correct CALENS_* secrets for changelog workflow (#41575)

fix: use correct secrets for changelog workflow

Author: DeepDiver1975

.github/workflows/changelog.yml

@@ -12,5 +12,5 @@ jobs:
   changelog:
     uses: owncloud/reusable-workflows/.github/workflows/calens.yml@main
     secrets:
-      APP_ID: ${{ secrets.CHANGELOG_APP_ID }}
-      APP_PRIVATE_KEY: ${{ secrets.CHANGELOG_APP_PRIVATE_KEY }}
+      APP_ID: ${{ secrets.CALENS_APP_ID }}
+      APP_PRIVATE_KEY: ${{ secrets.CALENS_APP_PRIVATE_KEY }}