Bump nerves_pack from 0.5.0 to 0.7.0 in /nerves_key_quickstart_fw

Bumps [nerves_pack](https://github.com/nerves-project/nerves_pack) from 0.5.0 to 0.7.0.
- [Release notes](https://github.com/nerves-project/nerves_pack/releases)
- [Changelog](https://github.com/nerves-project/nerves_pack/blob/main/CHANGELOG.md)
- [Commits](nerves-project/nerves_pack@v0.5.0...v0.7.0)

---
updated-dependencies:
- dependency-name: nerves_pack
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

nerves_key_quickstart_fw/mix.exs

@@ -49,7 +49,7 @@ defmodule NervesKeyQuickstartFw.MixProject do
 
       # Dependencies for all targets except :host
       {:nerves_runtime, "~> 0.11.3", targets: @all_targets},
-      {:nerves_pack, "~> 0.5.0", targets: @all_targets},
+      {:nerves_pack, "~> 0.7.0", targets: @all_targets},
       {:nerves_time, "~> 0.4", targets: @all_targets},
 
       # Dependencies for specific targets