also cache .hpc

Author: MaximilianAlgehed

.github/workflows/haskell-ci.yml

@@ -40,6 +40,7 @@ jobs:
           path: |
             ~/.cabal/store
             dist-newstyle
+            .hpc
           restore-keys: ${{ matrix.ghc-version }}-
       - run: cabal build all --ghc-options=-fhpc
       - run: cabal test all --ghc-options=-fhpc