fix: include beta releases in wiki Downloads publish

[bh679]

Summary

The v0.281.0 release's "Publish wiki Downloads pages" step skipped with "No published releases found", leaving the wiki Downloads page frozen at v0.73.0 (2026-04-27).

Root cause: scripts/publish-wiki.sh filtered releases with select(.draft==false and .prerelease==false). Every Dungeon Train release is a pre-1.0 beta (release.yml marks any pre-1.0 tag prerelease: true), so the filter matched 0 releases on every run.

Change

One line in scripts/publish-wiki.sh — drop the prerelease==false condition (keep draft==false):

-  --jq '[.[] | select(.draft==false and .prerelease==false)]' \
+  --jq '[.[] | select(.draft==false)]' \

Plus dev PATCH bump mod_version 0.281.0 → 0.281.1.

Already done (out-of-band)

Republished the wiki for v0.281.0 via the script's documented local-test mode, so the page is already current — Downloads shows v0.281.0; Archive lists the newest 100 betas. This PR makes it automatic on every future release.

Known limitation (pre-existing)

gh api uses per_page=100 with no pagination → the Archive lists the newest 100 releases (older betas, incl. v0.73.0, fall off). The "latest" Downloads page is always correct. Full-history pagination (--paginate | jq -s) is a possible follow-up.

Test plan

• Ran scripts/publish-wiki.sh locally (RELEASE_TAG=v0.281.0) → committed Downloads.md + Downloads-Archive.md to the wiki (commit 809cf05).
• Verified via raw URL: Downloads → "Latest release: v0.281.0"; Archive → 100 rows, v0.281.0 at top.
• No mod code / deps / save-format touched — CI-tooling only.

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