[submodule] Update submodule sonic-bmp to the latest HEAD automatically (sonic-net#20955)

#### Why I did it
src/sonic-bmp
```
* 4dcef92 - (HEAD -> master, origin/master, origin/HEAD) Merge pull request sonic-net#16 from FengPan-Frank/fix1 (25 hours ago) [Feng-msft]
* 4735a94 - Bug fixing during integration test (35 hours ago) [Feng Pan]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld