[submodule] Update submodule sonic-sairedis to the latest HEAD automatically (#18815)

#### Why I did it
src/sonic-sairedis
```
* ec6be37 - (HEAD -> 202305, origin/202305) Enable 8 Lanes Support in vslib (#1355) (22 hours ago) [Deepak Singhal]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld