Run cabal update on ci

Author: anka-213

.github/workflows/haskell.yml

@@ -34,6 +34,8 @@ jobs:
           ${{ runner.os }}-build-
           ${{ runner.os }}-
 
+    - name: Cabal update
+      run: cabal update
     - name: Build
       run: cabal build all
     - name: Test