Bump actions/cache from 2.1.7 to 3

.github/workflows/ci.yml

@@ -14,17 +14,17 @@ jobs:
       fail-fast: false
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/cache@v2.1.7
+    - uses: actions/cache@v3
       name: Cache ~/.cabal/packages
       with:
         path: ~/.cabal/packages
         key: ${{ runner.os }}-${{ matrix.ghc }}-cabal-packages
-    - uses: actions/cache@v2.1.7
+    - uses: actions/cache@v3
       name: Cache ~/.cabal/store
       with:
         path: ~/.cabal/store
         key: ${{ runner.os }}-${{ matrix.ghc }}-cabal-store
-    # - uses: actions/cache@v2.1.7
+    # - uses: actions/cache@v3
     #   name: Cache dist-newstyle
     #   with:
     #     path: dist-newstyle