fix: removed author and committer information from PR (#43)

Author: bradegler

.github/workflows/update-checksums.yml

@@ -50,8 +50,6 @@ jobs:
           token: '${{ steps.mint-token.outputs.token }}'
           add-paths: 'terraform-checksums.json'
           commit-message: 'chore: [automated] checksum updates'
-          committer: 'abcxyz bot <[email protected]>'
-          author: 'abcxyz bot <[email protected]>'
           delete-branch: true
           branch: '${{ env.PR_BRANCH }}'
           title: 'chore: Terraform checksum updates for ${{ env.UPDATE_DATE }}'