Fix cleanup condition to work with boolean types

Signed-off-by: Max Brauer <[email protected]>

Author: mamachanko

.github/workflows/run-scdf-at.yml

@@ -249,7 +249,7 @@ jobs:
     environment: scdf_at
     needs: [ lease_test_env, rabbit, kafka ]
     # Always delete the lease. Unless, we want to explicitly keep it after a successful run.
-    if: ${{ (success() && inputs.delete-lease-after-success == 'true') || failure() }}
+    if: ${{ (success() && inputs.delete-lease-after-success) || failure() }}
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/install-shepherd-cli