fix typo for bash raindrops exercise (#1854)
fix typo for bash raindrops exercise (#1854)

Co-authored-by: khendrikse <f73db7008c2095e3c9efbc2759d28ff6a7c5fbd7@youngcapital.nl>
exercism/x-common,jmluy/x-common,jmluy/x-common,exercism/x-common,jmluy/x-common