fix delete block type prompt

[zzstoatzz]

before

» prefect block type delete twitter-credentials
Are you sure you want to delete block with id <built-in function id>? [y/N]:

after

» prefect block type delete twitter-credentials
Are you sure you want to delete block type 'twitter-credentials'? [y/N]:

[codspeed-hq]

CodSpeed Performance Report

Merging #15989 will not alter performance

_{Comparing fix-prompt-delete-block-type (51bec3a) with main (2b018ea)}

Summary

✅ 3 untouched benchmarks