Try not caching store in validate jobs to avoid double package bugs

Author: Mikolaj

.github/workflows/validate.yml

@@ -65,14 +65,14 @@ jobs:
 
       #  See the following link for a breakdown of the following step
       #  https://github.com/haskell/actions/issues/7#issuecomment-745697160
-      - uses: actions/cache@v2
-        with:
-          # validate.sh uses a special build dir
-          path: |
-            ${{ steps.setup-haskell.outputs.cabal-store }}
-            dist-*
-          key: ${{ runner.os }}-${{ matrix.ghc }}-20220419-${{ github.sha }}
-          restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-20220419-
+      #- uses: actions/cache@v2
+      #  with:
+      #    # validate.sh uses a special build dir
+      #    path: |
+      #      ${{ steps.setup-haskell.outputs.cabal-store }}
+      #      dist-*
+      #    key: ${{ runner.os }}-${{ matrix.ghc }}-20220419-${{ github.sha }}
+      #    restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-20220419-
 
       - name: Work around git problem https://bugs.launchpad.net/ubuntu/+source/git/+bug/1993586 (cabal PR #8546)
         run: |