chore(deps): update haskell-actions/setup action to v2.7.7

Author: renovate[bot]

.github/workflows/build.yaml

@@ -120,7 +120,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: haskell-actions/setup@dd344bc1cec854a369df8814ce17ef337d6e6170 # v2.7.6
+      - uses: haskell-actions/setup@e447c4c045e7744463435b4b731e125861006ebb # v2.7.7
         with:
           # This must match the version in stack.yaml's resolver
           ghc-version: 9.6.6
@@ -180,7 +180,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: haskell-actions/setup@dd344bc1cec854a369df8814ce17ef337d6e6170 # v2.7.6
+      - uses: haskell-actions/setup@e447c4c045e7744463435b4b731e125861006ebb # v2.7.7
         with:
           ghc-version: ${{ matrix.ghc }}
       - name: Cache .cabal