ci: Replace --ignore-missing-env-vars with --allow-unavailable-runtime-config

Author: tomasol

.github/workflows/check.yml

@@ -62,5 +62,5 @@ jobs:
         run: |
           nix develop --command obelisk server verify \
             --deployment deployment.toml \
-            --ignore-missing-env-vars \
+            --allow-unavailable-runtime-config \
             --skip-db