Align bootstrap command in contributing guide

Author: billybox1926-jpg

CONTRIBUTING.md

@@ -24,6 +24,6 @@ Thanks for your interest in contributing.
 
 ## Local automation defaults
 
-- Bootstrap: `./scripts/bootstrap.sh`
+- Bootstrap: `bash scripts/bootstrap.sh`
 - Setup guide: `docs/developer-setup.md`
 - CI workflows: `.github/workflows/`