update from titiler 0.20

[vincentsarago]

https://github.com/developmentseed/titiler/blob/main/CHANGES.md#0200-2025-01-07

• remove rescale_dependency and color_formula_dependency attributes in TilerFactory class breaking change
• add render_func: Callable[..., Tuple[bytes, str]] = render_image attribute in TilerFactory class
• update /healthz endpoint to return dependencies versions (titiler, rasterio, gdal, ...)
• migrate templates/index.html to bootstrap5, remove unused css, reuse bs classes
• Updated WMTS endpoint to return layer bounds in coordinate ordering matching CRS order if WGS84 is not used