chore(Cargo.toml): bump spin to v2.6.0 and wasmtime to 21.0.1; update usage#24

vdice merged 2 commits intospinframework:mainspinframework/spin-trigger-command:mainfrom

vdice:chore/bump-spin-and-wasmtimevdice/spin-trigger-command:chore/bump-spin-and-wasmtimeCopy head branch name to clipboard