Bump leafo/gh-actions-lua from 8 to 12

Bumps [leafo/gh-actions-lua](https://github.com/leafo/gh-actions-lua) from 8 to 12.
- [Release notes](https://github.com/leafo/gh-actions-lua/releases)
- [Commits](leafo/gh-actions-lua@v8...v12)

---
updated-dependencies:
- dependency-name: leafo/gh-actions-lua
  dependency-version: '12'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/publish.yaml

@@ -17,7 +17,7 @@ jobs:
           echo "VERSION=$(echo ${{ github.ref }} | cut -d'/' -f3 | cut -c2-)" >> $GITHUB_ENV
       - uses: actions/checkout@v2
       - name: Set up Lua
-        uses: leafo/gh-actions-lua@v8
+        uses: leafo/gh-actions-lua@v12
         with:
           luaVersion: "5.3.5"