html should be imported from @ember/string instead

[jakevo]

As title, I think htmlSafe should be imported from ember/string instead of ember/template according to
https://emberjs.com/api/ember/release/modules/@ember%2Fstring

[jamesarosen]

See also emberjs/rfcs#236 and ember-codemods/ember-modules-codemod#85. @rwjblue says @ember/template is the correct location, but it doesn't work on any of the versions of ember we use.

[Turbo87]

you need to make sure that you have the most recent ember-rfc176-data version in your node_modules. e.g. if you use a yarn or npm lockfile you might still have an older one which still assumed it to be at @ember/string