Remove workflow and trigger the hash-generation as well on workflow-change;

Author: joergdw

.github/workflows/nix_adapt_hashes.yaml

@@ -5,6 +5,7 @@ on:
     branches:
       - master
     paths:
+      - ".github/workflows/nix_adapt_hashes.yaml"
       - "go.mod"
       - "go.sum"