Hey, I got a weird error in the Pyrra UI for SLOs using the latency indicator containing a `le` in it like [here](https://github.com/pyrra-dev/pyrra/blob/1ed2f3301251455dee757da1658c88fd32e0f1ca/examples/caddy-response-latency.yaml#L11). When using `le=1.0` I get the following in the UI:  When using `le=1` I get the following in the UI:  When using PromQL, I only get metrics containing e.g. `le=0.1`, `le=0.2`, `le=0.3`, `le=0.5`, `le=1.0`, `le=2.0`, ...