#130·Authorize upgrade to v21.1.1

This proposal, if approved, will authorize the upgrade to release v21.1.1 - runtime version hydradx/195.

• fix: DCA schedule dry-run by @dmoka in #721
• fix: incorrect handling of neg operand in exp function by @enthusiastmartin in #720
• docs: fix typo in readme by @kyoshisuki in #716

Full release notes: https://github.com/galacticcouncil/HydraDX-node/releases/tag/v21.1.1