Set the correct commit author for mozilla cert workflow

[Starttoaster]

Purpose:

To fix the mozilla ca cert update job.

Current Behavior:

When this workflow runs, the job logs output:

  remote: error: GH006: Protected branch update failed for refs/heads/update-cacert-pem.        
  remote: 
  remote: - Commits must have verified signatures.        
  remote:   Found 1 violation:        
  remote: 
  remote:   8edbcbe300a40af469074bbda694d670b74538ee        
  To https://github.com/Chia-Network/chia-blockchain
   ! [remote rejected] update-cacert-pem -> update-cacert-pem (protected branch hook declined)

This is likely because the commit author isn't being set correctly. The job logs also show the incorrect commit author for the gpg creds supplied to it.

New Behavior:

I believe this will just fix that.

In addition, I set the base and delete-branch fields just to define some newly undefined behavior. And updated the create-pull-request Action to the version it used to be because it was downgraded for some reason.

Testing Notes:

I just looked at some of the differences between the old workflow:

chia-blockchain/.github/workflows/mozilla-ca-cert.yml

Line 39 in d5e91a3

committer: "ChiaAutomation <automation@chia.net>"

And the new one: https://github.com/Chia-Network/chia-blockchain/blob/main/.github/workflows/update-mozilla-ca-cert.yaml#L34

And applied the changes that are relevant to this job using the incorrect commit author.