Daily dev bump workflow bot is broken

[elliette]

See workflow run here: https://github.com/flutter/devtools/actions/runs/12647460234/job/35239918522#step:6:46

++ date +%s
+ BRANCH_NAME=auto-bump-1736236917
+ git checkout -b auto-bump-1736236917
Switched to a new branch 'auto-bump-1736236917'
+ git commit -a -m 'Updating from 2.42.0-dev.1 to 2.42.0-dev.2'
[auto-bump-1736236917 18518be] Updating from 2.42.0-dev.1 to 2.42.0-dev.2
 2 files changed, 2 insertions(+), 2 deletions(-)
+ git push -u origin auto-bump-1736236917
remote: 
remote: Create a pull request for 'auto-bump-1736236917' on GitHub by visiting:        
remote:      https://github.com/flutter/devtools/pull/new/auto-bump-1736236917        
remote: 
To https://github.com/flutter/devtools
 * [new branch]      auto-bump-17[36](https://github.com/flutter/devtools/actions/runs/12659370749/job/35278341053#step:6:37)236917 -> auto-bump-1736236917
branch 'auto-bump-1736236917' set up to track 'origin/auto-bump-1736236917'.
+ '[' false == true ']'
++ gh pr create --title 'Updating from 2.42.0-dev.1 to 2.42.0-dev.2' --body 'Automated Version Bump'
HTTP [40](https://github.com/flutter/devtools/actions/runs/12659370749/job/35278341053#step:6:41)1: Bad credentials (https://api.github.com/graphql)
Try authenticating with:  gh auth login
+ PR_URL=

I'm guessing the workflow bot account credentials have expired.

[kenzieschmoll]

closing as duplicate of #8558