[submodule] Update submodule sonic-sairedis to the latest HEAD automa…

…tically (sonic-net#18077)

#### Why I did it
src/sonic-sairedis
```
* a91d51d - (HEAD -> master, origin/master, origin/HEAD) Enable 8 Lanes Support in vslib (sonic-net#1355) (55 minutes ago) [Deepak Singhal]
* ea8767c - [nvidia] Update syncd start to cover changes in SDK initialization process. (sonic-net#1343) (6 days ago) [Oleksandr Ivantsiv]
* 46e713d - [syncd] Add workaround for SET operation on SAI_HOSTIF_ATTR_QUEUE (sonic-net#1345) (7 days ago) [Kamil Cudnik]
```
#### How I did it
#### How to verify it
#### Description for the changelog