ci: Update blunderbuss.yml (googleapis#2040)

## Description

> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution

## PR Checklist

> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:

- [ ] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [ ] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change

🛠️ Fixes #<issue_number_goes_here>

Author: averikitsch

.github/blunderbuss.yml

@@ -15,7 +15,6 @@
 assign_issues:
   - Yuan325
   - duwenxin99
-  - averikitsch
   - anubhav756
   - twishabansal
   - dishaprakash
@@ -62,8 +61,7 @@ assign_issues_by:
     - 'googleapis/toolbox-spanner'
 assign_prs:
   - Yuan325
-  - duwenxin99     
-  - averikitsch 
+  - duwenxin99
 assign_prs_by:
   - labels:
     - 'product: alloydb'