Bump haskell/actions from 1 to 1.2.1 (#339)

Bumps [haskell/actions](https://github.com/haskell/actions) from 1 to 1.2.1.
- [Release notes](https://github.com/haskell/actions/releases)
- [Commits](haskell/actions@v1...v1.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/windows_and_macOS.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
     steps:
     - uses: actions/checkout@v2
-    - uses: haskell/actions/setup@v1
+    - uses: haskell/actions/setup@v1.2.1
       id: setup-haskell-cabal
       with:
         ghc-version: ${{ matrix.ghc }}