build action: remove env vars since they can't be used by PRs

Author: JonnyOThan

.github/workflows/build.yml

@@ -5,14 +5,16 @@ on:
     branches: [ "develop" ]
     paths:
       - '**/*.cs'
+      - '**/*.csproj'
   pull_request:
     paths:
       - '**/*.cs'
+      - '**/*.csproj'
   workflow_dispatch:
   workflow_call:
 
 jobs:
   build:
     uses: KSPModdingLibs/KSPBuildTools/.github/workflows/build.yml@main
     with:
-      artifacts: ${{ vars.BUILD_ARTIFACTS }}
+      artifacts: Resources/GameData LICENSE* README* CHANGELOG*