Put freeze file usage into github cache key, remove date

Change-Id: Ia364e80a36f4d83d56ced4c365cd48080c9d348a

.github/workflows/applications.yml

@@ -297,19 +297,15 @@ jobs:
     # dist cache
     # the cache-key forces uploading of cache at least once a day, which ensures that
     # upstream dependency changes are captured regularly.
-    - name: Create date file for dist-newstyle cache key
-      id: cache-date
-      run: |
-        echo "value=$(date +%Y.%j)" >> $GITHUB_OUTPUT
     - uses: actions/cache@v3
       name: Cache dist-newstyle
       with:
         path: |
           dist-newstyle
-        key: ${{ matrix.os }}-${{ matrix.ghc }}-2-${{ steps.cache-date.outputs.value }}-${{ hashFiles('cabal.*', '*.cabal', 'src/**', 'test/**') }}
+        key: ${{ matrix.os }}-${{ matrix.ghc }}-${{ matrix.use-freeze-file }}-2-${{ hashFiles('cabal.*', '*.cabal', 'src/**', 'test/**') }}
         restore-keys: |
-          ${{ matrix.os }}-${{ matrix.ghc }}-2-${{ steps.cache-date.outputs.value }}-
-          ${{ matrix.os }}-${{ matrix.ghc }}-2-
+          ${{ matrix.os }}-${{ matrix.ghc }}-${{ matrix.use-freeze-file }}-2-
+          ${{ matrix.os }}-${{ matrix.ghc }}-
 
     # Build
     - name: Delete Freeze file if it exists