fix(test): update deploy help test to check --dry-run instead of --plan

The --plan alias was removed in the breaking change commit.

Confidence: high
Scope-risk: narrow

Author: jesseturner21

src/cli/commands/deploy/__tests__/deploy.test.ts

@@ -18,7 +18,7 @@ describe('deploy --help', () => {
     expect(result.stdout.includes('--yes')).toBeTruthy();
     expect(result.stdout.includes('--verbose')).toBeTruthy();
     expect(result.stdout.includes('--json')).toBeTruthy();
-    expect(result.stdout.includes('--plan')).toBeTruthy();
+    expect(result.stdout.includes('--dry-run')).toBeTruthy();
   });
 });