Update format check command in README

Author: saurabh500

README.md

@@ -49,7 +49,7 @@ cargo build
 Before submitting changes, run the full check suite:
 
 ```bash
-./scripts/bfmt.sh       # Format check
+./scripts/bfmt.sh  or scripts/bfmt.ps1     # Format check
 ./scripts/bclippy.sh    # Lint (warnings are errors)
 cargo btest      # Test with cargo-nextest
 ```