ci: opt into node 24 for js actions

mathieudutour/github-tag-action@v6.2 currently runs on node 20, which
github actions deprecates on 2026-06-02 (removed 2026-09-16). setting
FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true at the release job level opts
in now, silencing the warning and catching any incompatibility early.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: brtkwr

.github/workflows/ci.yaml

@@ -14,6 +14,11 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+    env:
+      # Opt in early — Node.js 20 actions (e.g. mathieudutour/github-tag-action)
+      # are deprecated and forced onto Node 24 starting 2026-06-02. Setting this
+      # ahead of time silences the deprecation warning and surfaces breakage early.
+      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
     steps:
       - uses: actions/checkout@v6
         with: