build(deps): bump subosito/flutter-action from 2.14.0 to 2.15.0

[dependabot]

Bumps subosito/flutter-action from 2.14.0 to 2.15.0.

Release notes

Sourced from subosito/flutter-action's releases.

v2.15.0

Hi! I'm Bartek and I'm a new maintainer of this action. I promise to take good care of it.

This release introduces the flutter-version-file option, which lets you easily centralize Flutter version in a single place – your pubspec.yaml file:

You can use it like this:

steps:
  - name: Clone repository
    uses: actions/checkout@v4
  - name: Set up Flutter
    uses: subosito/flutter-action@v2
    with:
      channel: stable
      flutter-version-file: pubspec.yaml # path to pubspec.yaml

Please note that for this to work, you need to specify exact Flutter version in pubspec.yaml:

environment:
  dart: ">=3.3.0 <4.0.0"
  flutter: 3.19.0 # This must be exact! No ranges allowed.

Apart from that, some minor README updates and code cleanup were performed.

Commits

• 3d80492 update README (#291)
• 0ef13f1 Add flutter-version-file (#290)
• 7564de3 Merge pull request #288 from subosito/chore/action_yaml_refactor
• 2b3ab6c convert some if-statements to be POSIX-compatible
• 49cd171 split longer lines
• cf12a39 Merge pull request #287 from subosito/minor
• cea4cf6 workflow.yaml: minor fix
• 043862d Merge pull request #286 from subosito/format
• e70699e file renames
• 766e0c1 minor readme format update
• Additional commits viewable in compare view

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