Remove default from -a help in `cf update-space-quota`
Remove default from -a help in `cf update-space-quota`

[finishes #118993413]

fujitsu-cf/cli,markstgodard/cli,markstgodard/cli,hyenaspots/cli,simonleung8/cli,simonleung8/cli,hyenaspots/cli,hyenaspots/cli,markstgodard/cli,hyenaspots/cli,simonleung8/cli,fujitsu-cf/cli,markstgodard/cli,fujitsu-cf/cli