Bump LuaLS to 3.18.2 in lint workflow (#422)

LuaLS 3.15.0 stack overflows in the cast-type-mismatch diagnostic while
resolving the recursive Commands.Status and Async.Status function type
aliases (functions whose return type is themselves). 3.18.2, the latest
release, resolves these correctly and runs the repository clean.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/fmtk.yml

@@ -23,7 +23,7 @@ jobs:
           jq -s '.[0] * .[1].settings' temp.luarc.json ${{ github.workspace }}/factorio/config.json > check.luarc.json
       - name: Install LuaLS
         run: |
-          wget https://github.com/LuaLS/lua-language-server/releases/download/3.15.0/lua-language-server-3.15.0-linux-x64.tar.gz -q -O lusls.tar.gz
+          wget https://github.com/LuaLS/lua-language-server/releases/download/3.18.2/lua-language-server-3.18.2-linux-x64.tar.gz -q -O lusls.tar.gz
           mkdir luals && tar -xf lusls.tar.gz -C luals && rm lusls.tar.gz
       - name: Run Lint Report
         shell: bash