Update haskell-ci dep, ghc versions.

.github/workflows/ci.dhall

@@ -4,8 +4,9 @@ in    haskellCi.generalCi
         haskellCi.matrixSteps
         ( Some
             { ghc =
-              [ haskellCi.GHC.GHC8101
-              , haskellCi.GHC.GHC883
+              [ haskellCi.GHC.GHC8104
+              , haskellCi.GHC.GHC901
+              , haskellCi.GHC.GHC884
               , haskellCi.GHC.GHC865
               ]
             , cabal = [ haskellCi.Cabal.Cabal32 ]

.github/workflows/ci.yaml

@@ -4,7 +4,7 @@ jobs:
     steps:
       - uses: "actions/checkout@v1"
       - id: setup-haskell-cabal
-        uses: "actions/setup-haskell@v1.1.4"
+        uses: "haskell/actions/setup@v1.2"
         with:
           cabal-version: "${{ matrix.cabal }}"
           enable-stack: false
@@ -28,8 +28,9 @@ jobs:
         cabal:
           - '3.2'
         ghc:
-          - '8.10.1'
-          - '8.8.3'
+          - '8.10.4'
+          - '9.0.1'
+          - '8.8.4'
           - '8.6.5'
 name: Haskell CI
 on: