Gytis Šk 501a782131 Update api-conventions.asciidoc (#22439)
The example

```
/<logstash-{now/d-2d}>,<logstash-{now/d-1d}>,<logstash-{now/d}>/_search
```

shows escaped URL where `,  => %2C`, so I assume it should be escaped and be present in the table
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