Bump tested GHC versions

Author: fendor

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        ghc: [8.10.7, 9.4.8, 9.6.4, 9.8.2]
+        ghc: [8.10.7, 9.6.7, 9.8.4, 9.12.2]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout