fix: update cache key to use PRODUCT_EXECUTABLE instead of Package.resolved

Author: nedithgar

.github/workflows/release.yml

@@ -96,7 +96,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: .build
-          key: ${{ runner.os }}-swift-${{ env.SWIFT_VERSION }}-${{ hashFiles('**/Package.resolved') }}
+          key: ${{ runner.os }}-swift-${{ env.SWIFT_VERSION }}-${{ env.PRODUCT_EXECUTABLE }}
           restore-keys: |
             ${{ runner.os }}-swift-${{ env.SWIFT_VERSION }}-
       - name: Cache Swiftly toolchains