Bump phoenix from 1.6.11 to 1.6.13

Bumps phoenix from 1.6.11 to 1.6.13.

Changelog

Sourced from phoenix's changelog.

1.6.13 (2022-09-29)

Enhancements

• [phx.gen.release] Fetch compatible docker image from API when passing --docker flag

1.6.12 (2022-09-06)

• Fix phx.gen.release Dockerfile pointing to expired image

Commits

• 6234b57 Release 1.6.13
• 7f07759 Fetch docker release image from API
• a01d10b Bump package lock
• 39842f5 Release v1.6.12
• b888c1f Update Dockerfile template (#4937)
• See full diff in compare view