update Github Actions (#859)

* update Github Actions

https://github.com/actions/setup-haskell has been archived.
I believe https://github.com/haskell/actions/tree/main/setup is current.

* try to fix stalling CI job

.github/workflows/main.yml

@@ -13,26 +13,26 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        cabal: ["3.2"]
+        cabal: ["3.4"]
         ghc:
           - "8.6.5"
-          - "8.8.3"
-          - "8.10.1"
+          - "8.8.4"
+          - "8.10.4"
         exclude:
           - os: macOS-latest
-            ghc: 8.8.3
+            ghc: 8.8.4
           - os: macOS-latest
             ghc: 8.6.5
           - os: windows-latest
-            ghc: 8.8.3
+            ghc: 8.8.4
           - os: windows-latest
             ghc: 8.6.5
 
     steps:
     - uses: actions/checkout@v2
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: actions/setup-haskell@v1.1.4
+    - uses: haskell/actions/setup@v1
       id: setup-haskell-cabal
       name: Setup Haskell
       with:
@@ -63,14 +63,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        stack: ["2.3.1"]
-        ghc: ["8.8.3"]
+        stack: ["2.7.1"]
+        ghc: ["8.8.4"]
 
     steps:
     - uses: actions/checkout@v2
       if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
 
-    - uses: actions/setup-haskell@v1.1.4
+    - uses: haskell/actions/setup@v1
       name: Setup Haskell Stack
       with:
         ghc-version: ${{ matrix.ghc }}