chore(ci): ensure "just lint-scripts" exits with a non-zero status (#…

…3026)

Unfortunately Just doesn't enable the "pipefail" option, so we need to
do it explicitly.

Justfile

@@ -190,7 +190,9 @@ lint-backend:
   @lint-commit-or-rollback ./backend/...
 
 lint-scripts:
-	@shellcheck -f gcc -e SC2016 $(find scripts -type f -not -path scripts/tests) | to-annotation
+  #!/bin/bash
+  set -euo pipefail
+  shellcheck -f gcc -e SC2016 $(find scripts -type f -not -path scripts/tests) | to-annotation
 
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