custom-completions/bend: rename to adere to *-completions.nu format

[cab404]

bumped into that when trying to automate importing completions

that's the only one breaking the rule (aside from auto-generate folder)

[fdncred]

Thanks

[cab404]

Ooof. It turned out that it was the only *-completion.nu one, but there's also tealdeer/tldr-completions.nu. I'll check better and submit another one.

[cab404]

~> ls /nix/store/6mijl8r2mg9wy1nm66bc32w5y8cyjc91-source/custom-completions/ 
| select name 
| each { { name: ($in.name | path basename), check: (($in.name)/($in.name | path basename)-completions.nu | path exists) } } 
| where check == false
╭───┬───────────────┬───────╮
│ # │     name      │ check │
├───┼───────────────┼───────┤
│ 0 │ README.md     │ false │
│ 1 │ auto-generate │ false │
│ 2 │ bend          │ false │
│ 3 │ tealdeer      │ false │
│ 4 │ yarn          │ false │
╰───┴───────────────┴───────╯

I'll fix it right away.