Fix missing bins

[MusicalNinjaDad]

• temporarily use v0.2.2 which has published binaries, so we can binstall self in CI. (taiki uses stable chain for fallback and we don't compile with that)

[sourcery-ai]

Hey - I've left some high level feedback:

• Consider adding a brief inline comment in the workflow next to ninja-xtask@0.2.2 explaining why this older version is pinned and under what condition it can be updated/removed, so future maintainers don’t inadvertently change it.
• The combined changelog header ## v0.2.4 & 0.2.5 makes it harder to see what changed in each version; consider splitting into separate sections for v0.2.4 and v0.2.5 and clarifying which changes apply to which version.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider adding a brief inline comment in the workflow next to `ninja-xtask@0.2.2` explaining why this older version is pinned and under what condition it can be updated/removed, so future maintainers don’t inadvertently change it.
- The combined changelog header `## v0.2.4 & 0.2.5` makes it harder to see what changed in each version; consider splitting into separate sections for `v0.2.4` and `v0.2.5` and clarifying which changes apply to which version.

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