fix(release): sync plugin class version

[superdav42]

Summary

• Synchronize WP_Ultimo::VERSION with the already released v2.15.0 metadata.
• Fix the release workflow validation failure reported by tag v2.15.0.

Evidence

Release workflow 30602425191 reported:

Plugin header: 2.15.0
readme.txt Stable tag: 2.15.0
package.json: 2.15.0
WP_Ultimo::VERSION: 2.14.2

Verification: php -l, PHPCS, PHPStan, and pre-commit checks passed.

---

aidevops.sh v3.32.198 plugin for OpenCode v1.18.5 with gpt-5.6-luna

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⚙️ Run configuration

Configuration used: defaults

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Run ID: 4f597ce5-eb89-446d-86f6-0e72d3d2ac97

📥 Commits

Reviewing files that changed from the base of the PR and between 0374c9e and d4431d5.

📒 Files selected for processing (5)

• VERSION
• inc/class-wp-ultimo.php
• package.json
• readme.txt
• ultimate-multisite.php

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[github-actions]

🔨 Build Complete - Ready for Testing!

📦 Download Build Artifact (Recommended)

Download the zip build, upload to WordPress and test:

• Build: ultimate-multisite
• ⬇️ Download from GitHub Actions
• ⬇️ Download without Github Account (nightly.link)

🌐 Test in WordPress Playground (Very Experimental)

Click the link below to instantly test this PR in your browser - no installation needed!
Playground support for multisite is very limitied, hopefully it will get better in the future.

🚀 Launch in Playground

Login credentials: admin / password

[github-actions]

Performance Test Results

Performance test results for 71c000c are in 🛎️!

[superdav42]

Summary

• Synchronize WP_Ultimo::VERSION with the already released v2.15.0 metadata.
• Fix the release workflow validation failure reported by tag v2.15.0.

Evidence

Release workflow 30602425191 reported:

Plugin header: 2.15.0
readme.txt Stable tag: 2.15.0
package.json: 2.15.0
WP_Ultimo::VERSION: 2.14.2

Verification: php -l, PHPCS, PHPStan, and pre-commit checks passed.

---

aidevops.sh v3.32.198 plugin for OpenCode v1.18.5 with gpt-5.6-luna

---

Merged via PR #1685 to main.
Merged by deterministic merge pass (pulse-wrapper.sh).