MLST Scheme

### Description of the bug

MLST is not called for Serratia species. The Primary_MLST_source result is " None-Unknown Unknown."
PubMLST does have a scheme - https://pubmlst.org/organisms/serratia-spp

### Command used and terminal output

```console

```

### Relevant files

_No response_

### System information

_No response_