tailscale: switch version and git ref to use a tag.
tailscale: switch version and git ref to use a tag.

The tag points to the same commit hash, so the binary
is unchanged.

Signed-off-by: David Anderson <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@natulte.net>

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