iio-sensor-proxy: 2.5 -> 2.7 (#61841)

* iio-sensor-proxy: 2.5 -> 2.6
Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/iio-sensor-proxy/versions

* iio-sensor-proxy: 2.6 -> 2.7
This release fixes broken sensor readings on multiple platforms due to a compiler optimisation.