[Chore] bump version to 0.2.2

[iamalwaysuncomfortable]

Motivation

Prepares the v0.2.2 release — the first to publish npm packages via trusted publishing (OIDC) with provenance attestation, following #26/#27/#28. No functional changes to the binary; the release itself is the end-to-end verification of the tokenless publish path.

Test Plan

• Cargo.lock updated in lockstep via cargo update --workspace (only the aleo-devnode version entry changed; all dependencies untouched).
• After merge: push tag v0.2.2; the release workflow validates the tag against Cargo.toml, builds, publishes the GitHub release, and dispatches the npm publish, which should log publishing with provenance. Post-release check: npm view @provablehq/aleo-devnode@0.2.2 dist.attestations.

Related PRs

• [CI/CD] switch npm publishing to trusted publishing (OIDC) #28 (OIDC cutover)
• fix npm publish path spec: bare dist-npm/<name> parses as GitHub shorthand #27, consolidate npm publishing for trusted publishing (OIDC) #26 (publish flow)