Update GHC build matrix

Update to be in line with HLS, except with only one 8.10 version.
Maybe we could get rid of even more, but good to match HLS.

Author: michaelpj

.github/workflows/haskell.yml

@@ -9,11 +9,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ghc: ['9.0.1', '8.10.4', '8.8.3', '8.6.5', '8.4.4']
+        ghc: ['9.0.1', '8.10.7', '8.8.4', '8.6.5']
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        exclude:
-          - os: windows-latest
-            ghc: '8.8.3' # fails due to segfault
 
     steps:
     - uses: actions/checkout@v2