chore(deps): update shimataro/ssh-key-action action to v2.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
shimataro/ssh-key-action	action	minor	v2.5.1 -> v2.7.0

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Release Notes

shimataro/ssh-key-action (shimataro/ssh-key-action)

v2.7.0: ssh-key-action 2.7.0 released

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Others

• Update to Node.js v20 (thanks @​princemaple)
• drop old containers; Ubuntu 16.04, and CentOS 7

v2.6.1: ssh-key-action 2.6.1 released

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Fixed

• JSON parse error on exit, if if_key_exists=fail and key exists

v2.6.0: ssh-key-action 2.6.0 released

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Others

• back up and restore files (thanks @​bambeusz)
• remove macos-10.15 and ubuntu-18.04 virtual environment

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