feat: update checks.yaml, point to specific commit · affinidi/affinidi-messaging@54a66e2

The following actions uses node12 which is deprecated and will be forced to run on node16: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

method `as_ed25519` is never used

`affinidi-messaging-didcomm` (lib) generated 1 warning

unused import: `error`

`affinidi-messaging-sdk` (lib) generated 1 warning (run `cargo fix --lib -p affinidi-messaging-sdk` to apply 1 suggestion)

unused import: `self`

unused import: `default`

unexpected `cfg` condition value: `uniffi`

unexpected `cfg` condition value: `uniffi`

this function depends on never type fallback being `()`

this function depends on never type fallback being `()`

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

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