* upgrade phoenix

Co-authored-by: Vini Brasil <vini@hey.com>

* fix a test (flash message)

The flash message in focus.html.eex was not covered by any test. This
commit fixes also fixes that.

* change function name

* remove unnecessary formatter and format

* update CI cache

* fix dialyzer error

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Co-authored-by: Vini Brasil <vini@hey.com>