[web CI] fixes shader key validation failure (#24701)
### Description
loose the regex for the log prefix. this fixes the shader key validation
failure and makes it less sensitive to future log format change.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
with chrome update, the chrome_debug logging format changed a little
bit.
