chore(shorebird_cli): adjust shorebird init suggested commands (#312)

TRUSTED_TESTERS.md

@@ -123,7 +123,7 @@ including the default Flutter counter works too, e.g.
 Reference the following commands to get started:
 
 🚙 To run your project use: "shorebird run".
-📦 To build your project use: "shorebird build".
+📦 To create a new release use: "shorebird release".
 🚀 To push an update use: "shorebird patch".
 
 For more information about Shorebird, visit https://shorebird.dev

packages/shorebird_cli/README.md

@@ -40,7 +40,7 @@ shorebird init
 Reference the following commands to get started:
 
 🚙 To run your project use: "shorebird run".
-📦 To build your project use: "shorebird build".
+📦 To create a new release use: "shorebird release".
 🚀 To push a new update use: "shorebird patch".
 
 For more information, visit https://shorebird.dev

packages/shorebird_cli/lib/src/commands/init_command.dart

@@ -115,7 +115,7 @@ ${lightGreen.wrap('🐦 Shorebird initialized successfully!')}
 Reference the following commands to get started:
 
 🚙 To run your project use: "${lightCyan.wrap('shorebird run')}".
-📦 To build your project use: "${lightCyan.wrap('shorebird build')}".
+📦 To create a new release use: "${lightCyan.wrap('shorebird release')}".
 🚀 To push an update use: "${lightCyan.wrap('shorebird patch')}".
 
 For more information about Shorebird, visit ${link(uri: Uri.parse('https://shorebird.dev'))}''',