Follow-up from "Update docs about sprintf vs GlSprintf usage"

The following discussion from !56529 (merged) should be addressed:

• @ekigbo started a discussion: (+2 comments)

  Maybe one for some extra input and a docs-review, but this sentence seems strange. To me it implies that __() and s__() are only available in vue templates 🤔, but in we can use both in raw javascript files too. I think this might need a bit of a rewording and also adding a similar example of s__() to the javascript section.

  WDYT?