fix: Adds restore keys to fallback

Author: eed3si9n

action.yml

@@ -60,6 +60,7 @@ runs:
       with:
         path: ${{ steps.cache-paths.outputs.sbt_diskcache }}
         key: ${{ steps.cache-paths.outputs.sbt_diskcachekey }}-${{ hashFiles('**/*.scala', '**/*.sbt', '**/*.properties') }}
+        restore-keys: ${{ steps.cache-paths.outputs.sbt_diskcachekey }}
     - name: "Download and Install sbt"
       shell: bash
       env: