Update CI actions

.github/workflows/ci.yml

@@ -17,17 +17,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Stack / GHC
-        uses: haskell/actions/setup@v1
+        uses: haskell-actions/setup@v2
         with:
-          ghc-version: '8.10.7' # Exact version of ghc to use
+          ghc-version: '8.10.7'
+          cabal-version: '3.10.2.1'
           enable-stack: true
           stack-version: 'latest'
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.stack
           key: ${{ runner.os }}-ghc-${{ matrix.ghc }}-${{ github.ref }}-${{ github.sha }}
@@ -63,16 +64,21 @@ jobs:
           - "9.2.8"
           - "9.4.8"
           - "9.6.4"
+        exclude:
+          # Clash 1.6 doesn't support latest GHCs
+          - {clash: "1.6.1", ghc: "9.2.8"}
+          - {clash: "1.6.1", ghc: "9.4.8"}
+          - {clash: "1.6.1", ghc: "9.6.4"}
 
     env:
       clash_version: ${{ matrix.clash }}
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Haskell
-        uses: haskell/actions/setup@v1
+        uses: haskell-actions/setup@v2
         id: setup-haskell-cabal
         with:
           ghc-version: ${{ matrix.ghc }}
@@ -88,7 +94,7 @@ jobs:
           mv cabal.project.freeze frozen
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
           key: ${{ runner.os }}-ghc-${{ matrix.ghc }}-${{ matrix.clash }}-${{ hashFiles('frozen') }}
@@ -114,7 +120,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Whitespace
         run: |