cli: spl-token, fix parameter parsing bug

[norwnd]

Possibly resolves solana-labs/solana#33938

I was browsing through this code, and this looks like a typo(bug) to me.

[buffalojoec]

Hey @norwnd thanks for contributing and working to solve this issue!

I was just looking into this, too when @joncinque shipped this fix #5734

The issue wasn't that it was supposed to be mint_authority, but rather the command was defined as program_authority but the parser was looking for authority. Obviously it doesn't find it, so it defaults to the local keypair, as mentioned in the issue you commented on.

Thanks again!