Setup-miniconda: GHAの非推奨：「add-path」と「set-env」

GitHub Actionsは、セキュリティリスクのためにset-envとadd-path非推奨にしています： https ：

現在、 `setup-miniconda 'アクションには次の行があります。

$ grep setup-miniconda/ -nre "set-env"
setup-miniconda//dist/delete/index.js:577: *   ::set-env name=MY_VAR::some value
setup-miniconda//dist/delete/index.js:700:        command_1.issueCommand('set-env', { name }, convertedVal);
setup-miniconda//dist/setup/index.js:17524: *   ::set-env name=MY_VAR::some value
setup-miniconda//dist/setup/index.js:20008:        command_1.issueCommand('set-env', { name }, convertedVal);
$ grep setup-miniconda/ -nre "add-path"
setup-miniconda//dist/delete/index.js:722:        command_1.issueCommand('add-path', {}, inputPath);
setup-miniconda//dist/setup/index.js:20030:        command_1.issueCommand('add-path', {}, inputPath);

GHAワークフローで使用するときにこの警告が発生する原因は次のとおりです。

The `add-path` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
The `set-env` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/