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GH-38981: [R][Release] Don't update version.json on compatible version release (#38982)

### Rationale for this change

If we release a compatible version such as 14.0.0 -> 14.0.1 and 14.1.1 -> 14.1.2, we don't need to update `docs/source/_static/versions.json` and `r/pkgdown/assets/versions.json`. Because we use compatible version ("14.0" and "14.1") instead of exact version ("14.0.0" and "14.1.1").

### What changes are included in this PR?

Add more update condition to detect compatible version release.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* Closes: #38981

Lead-authored-by: Sutou Kouhei <kou@clear-code.com>
Co-authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Co-authored-by: Sutou Kouhei <kou@cozmixng.org>
Signed-off-by: Raúl Cumplido <raulcumplido@gmail.com>