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

[vdice]

• bump spin crates to 2.6.0
• bump wasmtime-wasi to 21.0.1; update usage
• bump rust version to 1.76 in Cargo.toml and GH workflow to address https://github.com/fermyon/spin-trigger-command/actions/runs/9603461830/job/26486711692?pr=24
  • Question: should I also bump the rust version to the same in the project Cargo.toml?

[vdice]

How is the sample app in this repo run/tested?

First attempt yields:

$ spin up
Warning: You're using a pre-release version of Spin (2.7.0-pre0). This plugin might not be compatible (supported: >=2.0). Continuing anyway.
Logging component stdio to ".spin/logs/"
2024-06-20T21:08:04.418205Z ERROR spin_trigger::cli: Trigger executor failed
Error: Wasi preview 2 components need to target the wasi:cli world

Caused by:
    exported instance `wasi:cli/[email protected]` not present
    ```

[itowlson]

@vdice Are you on a recent version of cargo component? What does wasm-tools component wit tell you about the Wasm file?

[vdice]

@itowlson that was it, thank you! I was on a much earlier version of cargo component. @kate-goldenring helped determine this was the cause. I can now build and run the sample app 🚀

[kate-goldenring]

LGTM. We should bump the spin-pluginify.toml before the release