i-pi/i-pi: v3.1.11

Few bugfixes, experimental json input What's Changed Feat/json input by @venkatkapil24 in https://github.com/i-pi/i-pi/pull/506 Addressing reported issue by @mahrossi in https://github.com/i-pi/i-pi/pull/502 Applied free-particle kinetic prefactor in TD estimators by @Bohaz-111 in https://github.com/i-pi/i-pi/pull/508 remdsort handling of extras_bias output by @armaet in https://github.com/i-pi/i-pi/pull/514 A one-liner to enable neighbor list evaluation on cuda by @ceriottm in https://github.com/i-pi/i-pi/pull/516 Bugfix/remd plumed by @ceriottm in https://github.com/i-pi/i-pi/pull/519 Update version, and bumped GH actions version while whe're at it by @ceriottm in https://github.com/i-pi/i-pi/pull/520 Full Changelog: https://github.com/i-pi/i-pi/compare/v3.1.10...v3.1.11