update numbercall function names

[Ingurum]

I think its number_to_min and number_increment according to https://esphome.io/api/classesphome_1_1number_1_1_number_call.html for the lambda example

Description:

Related issue (if applicable): fixes

Pull request in esphome with YAML changes (if applicable): esphome/esphome#<esphome PR number goes here>

Checklist:

• [ ] Branch: next is for changes and new documentation that will go public with the next ESPHome release. Fixes, changes and adjustments for the current release should be created against current.
• [ ] Link added in /index.rst when creating new documents for new components or cookbook.

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