Merge pull request 'build-push: drop the empty ${{ }} that silenced the registry login' (#155) from fix/build-push-empty-expression into dev

.forgejo/workflows/build-push.yml

@@ -131,7 +131,7 @@ jobs:
           # credential that was in fact valid. Strip first, echo never.
           #
           # The token also goes through the ENVIRONMENT rather than being
-          # interpolated into the script text. `${{ }}` is substituted before bash
+          # interpolated into the script text. An expression is substituted before bash
           # parses the line, so a value containing a quote or newline would change
           # the shape of the command itself rather than just its arguments.
           tok=$(printf '%s' "$REGISTRY_TOKEN" | tr -d ' \t\r\n')