Upgrade qnapstats to 0.2.7

[fabaff]

Description:

Changelog: https://github.com/colinodell/python-qnapstats/releases/tag/0.2.7

Related issue (if applicable): partial #15479

Example entry for configuration.yaml (if applicable):

sensor:
  - platform: qnap
    host:192.168.1.6
    username: !secret qnap_user
    password: !secret qnap_pass
    monitored_conditions:
      - status
      - cpu_usage

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.