Here we change the default liveIndexing size.
https://mattermost.atlassian.net/browse/MM-59095
```release-note
Fix a bug where indexing would always be done async
even after setting LiveIndexingBatchSize to 1. Now
we respect the config and index synchronously if the
value is set to 1.
```
Co-authored-by: Mattermost Build <build@mattermost.com>