[submodule] Update submodule sonic-swss to the latest HEAD automatica…

…lly (#18051)

#### Why I did it
src/sonic-swss
```
* b18cbac6 - (HEAD -> master, origin/master, origin/HEAD) [Ci] Fix the test script naming issue (#3021) (81 minutes ago) [xumia]
* 5fd896f6 - [PortOrch] Add FEC codeword errors in port stats (#3029) (87 minutes ago) [vdahiya12]
* 77d56e6e - Fix the Orchagent crash seen during Port channel OC test cases. (#3042) (9 hours ago) [saksarav-nokia]
* 4d470592 - Fix memory leak and object copying bugs in orchagent (#3017) (10 hours ago) [Saikrishna Arcot]
```
#### How I did it
#### How to verify it
#### Description for the changelog