chore: bump helm chart versions for NeuVector 5.4.12 - #673

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744, actions/setup-go@be3c94b385c4f180051c996d336f57a34c397495. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Unexpected input(s) 'command', 'config', valid inputs are ['version', 'yamllint_version', 'yamale_version']