[Forwardport] Fixed documentation about viewModels #15154
Merged
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Original PR: #15067
Fixed documentation about viewModels. The key in XML should be view_model instead of viewMode.
Description
\Magento\Backend\Block\Template
documents view models and how to use them in blocks. The key used in arguments was viewModel which is wrong. Changed it to view_model and added an extra line about how to call these view modelsManual testing scenarios
Changed comments. Hence not applicable
Contribution checklist