sobstel

[DOCS] Warn against uniqueness validator when create_or_find_by is used [ci-skip]

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### Motivation / Background It can be really confusing when use you have `uniqueness` validator and try to use `create_by_find_by` eg. https://github.com/rails/rails/issues/36027. ### Checklist * [x] This Pull Request is...

> Gives the trim mode to be used by ERB. It defaults to '-', which turns on trimming of tail spaces and newline when using or . See the [Erubis...

It looks like 4.3.0 and 4.3.1 were wrongly labeled as 4.2.0 and 4.2.1 respectively in CHANGELOG file. It can be confusing, eg I thought that it's enough to update to...