[submodule] Update submodule sonic-dash-api to the latest HEAD automatically (sonic-net#23416)

#### Why I did it
src/sonic-dash-api
```
* aa3fc48 - (HEAD -> master, origin/master, origin/HEAD) [ci] Automated agent pool migration for branch master (sonic-net#46) (3 days ago) [yijingyan2]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Signed-off-by: xiaweijiang <[email protected]>

Author: mssonicbld