workflows: Fix po-refresh token
workflows: Fix po-refresh token

actions/checkout always uses a token to clone the tree. This lands in
.git/config as `extraheader = AUTHORIZATION basic ...`, which overrides
our global setting in ~/.git-credentials. As a result, `git push` to the
cockpituous fork was denied.

Tell checkout to use the cockpituous token instead for consistency.

Closes #14971
deryni/cockpit,deryni/cockpit,martinpitt/cockpit,deryni/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,garrett/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit,garrett/cockpit,deryni/cockpit,deryni/cockpit,deryni/cockpit,garrett/cockpit,garrett/cockpit,deryni/cockpit,mvollmer/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mvollmer/cockpit,mvollmer/cockpit,garrett/cockpit,cockpit-project/cockpit,cockpit-project/cockpit