GPG error for ubuntu

[Dan Muller]

I think that there is a bit of maintenance that needs to be done on the ubuntu apt repository.

GPG error: https://storage.googleapis.com/bazel-apt stable InRelease: The following signatures were invalid: EXPKEYSIG 3D5919B448457EE0 Bazel Developer (Bazel APT repository key) <baze...@googlegroups.com>
E: The repository 'https://storage.googleapis.com/bazel-apt stable InRelease' is not signed.