check coverage in env

Author: MaximilianAlgehed

.github/workflows/haskell-ci.yml

@@ -14,9 +14,6 @@ on:
   schedule:
     - cron: 0 0 * * *
 
-env:
-  latest_ghc: "9.12"
-
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
@@ -40,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
 
     env:
-      coverage: ${{ github.event.pull_request && matrix.ghc_version == env.latest_ghc }}
+      coverage: ${{ github.event.pull_request && matrix.ghc_version == "9.12" }}
 
     steps:
       - uses: actions/checkout@v4