Renamed ignore flag in CI

I need to read the docs better

Author: NiLSPACE

.github/workflows/ci.yml

@@ -32,4 +32,4 @@ jobs:
       - name: Run tests
         run: |
           cd ~/Checker && lua CuberitePluginChecker.lua -p $GITHUB_WORKSPACE -a ~/AutoAPI -e ~/ManualAPI.lua -i APIImpl/All.lua -s $GITHUB_WORKSPACE/Tests/selection.lua -g
-          cd $GITHUB_WORKSPACE && luacheck . --codes --ignore Tests/*
+          cd $GITHUB_WORKSPACE && luacheck . --codes --exclude-files Tests/*