ccache: fix download hash
ccache: fix download hash

It came from commit 11870cb (PR #162139).
It's unclear what went wrong; at some moment the hash did match,
so it might be modification of the tag upstream
or some imperfection in the way we canonicalize.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs