fix(Billing): Update yearly price for Scale-Up

[emyller]

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• I have filled in the "Changes" section below.
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Changes

Contributes to https://github.com/Flagsmith/flagsmith-private/issues/107

• Update yearly Scale-Up price to 250 USD / mo.
• Fix outdated 10% discount text

How did you test this code?

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Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ready	Preview, Comment	Apr 17, 2026 9:53pm
flagsmith-frontend-staging	Ready	Preview, Comment	Apr 17, 2026 9:53pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Apr 17, 2026 9:53pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-7285	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-7285	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-7285	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7285	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7285	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-7285	Finished ✅	Results ✅

[github-actions]

Playwright Test Results (oss - depot-ubuntu-latest-16)

 11 passed

Details

 11 tests across 8 suites
 24.7 seconds
 4eca2f2
 🔄 Run: #16173 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 11 passed

Details

 11 tests across 8 suites
 51.3 seconds
 4eca2f2
 🔄 Run: #16173 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 2 passed

Details

 2 tests across 2 suites
 46 seconds
 4eca2f2
 🔄 Run: #16173 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 2 passed

Details

 2 tests across 2 suites
 1 minute, 16 seconds
 4eca2f2
 🔄 Run: #16173 (attempt 1)

[github-actions]

Visual Regression

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